3
More Annotations
2
A complete backup of max-upgrade.blogspot.com
max-upgrade.blogspot.com
Are you over 18 and want to see adult content?
2
Favourite Annotations
5
2
Text
FUNCTIONS - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5. 13. Functions. One often-overlooked feature of Bourne shell script programming is that you can easily write functions for use within your script. This is generally done in one of two ways; with a simple script, the
ESCAPE CHARACTERS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. SUBSTITUTING STRINGS WITHIN VARIABLE VALUES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed GETOPT - SHELL SCRIPTING TIPSSEE MORE ON SHELLSCRIPT.SH FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS CHANGING TO UPPERCASE OR LOWERCASE The ^ operator converts to uppercase, while , converts to lowercase. If you double-up the operators, ie, ^^ or ,,, it applies to the whole string; otherwise, it applies only to the first letter (that isn't absolutely correct - see "Advanced Usage" below - but for most uses, it's an adequate description). For example, if you want to ensure that EDITING A LINE IN A TEXT EDITOR Editing a line in a text editor. Copy a command into a text editor for further editing. Sometimes, when you are working in an interactive shell, you find that you actually want to edit the current command line in a text editor. Typically, when you have finally crafted the exact command that you would like to use in a shell script. EXPANDING LISTS IN BASH Expanding Lists. You can supply a hard-coded, comma-separated list to Bash, and it will expand the whole string with every permutation, in order. $ echo {George,Ringo,John,Paul}" was a Beatle." George was a Beatle. Ringo was a Beatle. John was a Beatle. Paul was aPOETRY IN CODE
So there's a poem in code, apparently going back to 1990, made almost entirely without words. For it to make sense as a poem, it helps if you read it out loud: Waka waka bang splat tick tick hash, Caret quote back-tick dollar dollar dash, Bang splat equal at dollar under-score, Percent splat waka waka tilde number four, Ampersand bracket FUNCTIONS - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5. 13. Functions. One often-overlooked feature of Bourne shell script programming is that you can easily write functions for use within your script. This is generally done in one of two ways; with a simple script, theESCAPE CHARACTERS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. SUBSTITUTING STRINGS WITHIN VARIABLE VALUES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed GETOPT - SHELL SCRIPTING TIPSSEE MORE ON SHELLSCRIPT.SH FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS CHANGING TO UPPERCASE OR LOWERCASE The ^ operator converts to uppercase, while , converts to lowercase. If you double-up the operators, ie, ^^ or ,,, it applies to the whole string; otherwise, it applies only to the first letter (that isn't absolutely correct - see "Advanced Usage" below - but for most uses, it's an adequate description). For example, if you want to ensure that EDITING A LINE IN A TEXT EDITOR Editing a line in a text editor. Copy a command into a text editor for further editing. Sometimes, when you are working in an interactive shell, you find that you actually want to edit the current command line in a text editor. Typically, when you have finally crafted the exact command that you would like to use in a shell script. EXPANDING LISTS IN BASH Expanding Lists. You can supply a hard-coded, comma-separated list to Bash, and it will expand the whole string with every permutation, in order. $ echo {George,Ringo,John,Paul}" was a Beatle." George was a Beatle. Ringo was a Beatle. John was a Beatle. Paul was aPOETRY IN CODE
So there's a poem in code, apparently going back to 1990, made almost entirely without words. For it to make sense as a poem, it helps if you read it out loud: Waka waka bang splat tick tick hash, Caret quote back-tick dollar dollar dash, Bang splat equal at dollar under-score, Percent splat waka waka tilde number four, Ampersand bracket UNDERSTANDING SHELL SCRIPT VARIABLES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailedQUICK REFERENCE
Quick Reference - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 15. Quick Reference. This is a quick reference guide to the meaning of some of the less easily guessed commands and codes of shell scripts. By their nature, they are alsoquite difficult to
CASE - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As MODIFYING A SHELL SCRIPT IN PLACE Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. HOURS, MINUTES, SECONDS Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailedDOS2UNIX / UNIX2DOS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed EXPANDING LISTS IN BASH Expanding Lists. You can supply a hard-coded, comma-separated list to Bash, and it will expand the whole string with every permutation, in order. $ echo {George,Ringo,John,Paul}" was a Beatle." George was a Beatle. Ringo was a Beatle. John was a Beatle. Paul was a CHECKING THE EXIT STATUS OF ANY COMMAND IN A PIPELINE Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed THE SHELL SCRIPTING TUTORIALLOOPSA FIRST SCRIPTVARIABLESACADEMIC LINKSINTERACTIVE SHELLCASE This tutorial is written to help people understand some of the basics of shell script programming (aka shell scripting), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use. FUNCTIONS - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5. 13. Functions. One often-overlooked feature of Bourne shell script programming is that you can easily write functions for use within your script. This is generally done in one of two ways; with a simple script, the UNDERSTANDING SHELL SCRIPT VARIABLES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailedQUICK REFERENCE
Quick Reference - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 15. Quick Reference. This is a quick reference guide to the meaning of some of the less easily guessed commands and codes of shell scripts. By their nature, they are also quite difficult to find using search engines.ESCAPE CHARACTERS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As SUBSTITUTING STRINGS WITHIN VARIABLE VALUES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed CHANGING TO UPPERCASE OR LOWERCASE The ^ operator converts to uppercase, while , converts to lowercase. If you double-up the operators, ie, ^^ or ,,, it applies to the whole string; otherwise, it applies only to the first letter (that isn't absolutely correct - see "Advanced Usage" below - but for most uses, it's an adequate description). For example, if you want to ensure that FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS THE SHELL SCRIPTING TUTORIALLOOPSA FIRST SCRIPTVARIABLESACADEMIC LINKSINTERACTIVE SHELLCASE This tutorial is written to help people understand some of the basics of shell script programming (aka shell scripting), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use. FUNCTIONS - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5. 13. Functions. One often-overlooked feature of Bourne shell script programming is that you can easily write functions for use within your script. This is generally done in one of two ways; with a simple script, the UNDERSTANDING SHELL SCRIPT VARIABLES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailedQUICK REFERENCE
Quick Reference - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 15. Quick Reference. This is a quick reference guide to the meaning of some of the less easily guessed commands and codes of shell scripts. By their nature, they are also quite difficult to find using search engines.ESCAPE CHARACTERS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As SUBSTITUTING STRINGS WITHIN VARIABLE VALUES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed CHANGING TO UPPERCASE OR LOWERCASE The ^ operator converts to uppercase, while , converts to lowercase. If you double-up the operators, ie, ^^ or ,,, it applies to the whole string; otherwise, it applies only to the first letter (that isn't absolutely correct - see "Advanced Usage" below - but for most uses, it's an adequate description). For example, if you want to ensure that FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS THE SHELL SCRIPTING TUTORIAL This tutorial is written to help people understand some of the basics of shell script programming (aka shell scripting), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use.A FIRST SCRIPT
A First Script - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 3. A First Script. For our first shell script, we'll just write a script which says "Hello World". We will then try to get more out of a Hello World program than any othertutorial you've
ECHO - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As VARIABLES - PART 3 - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed EXIT CODES - SHELL SCRIPTING TUTORIAL Exit Codes. Exit codes are a number between 0 and 255, which is returned by any Unix command when it returns control to its parent process. Other numbers can be used, but these are treated modulo 256, so exit -10 is equivalent to exit 246, and exit 257 is equivalent to exit 1 . These can be used within a shell script to change the flow of FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed GENERATING SEQUENCES IN BASH Buy this tutorial as a PDF for only $5! All Shell Scripting Tips. 20 May 2015. Generating Sequences in Bash. A useful but underused feature of the Bash shell is called Brace Expansion.. It takes a few different forms, but basically, anything within the { braces } is expanded, either as a list ({apples,oranges,bananas}), a numerical sequence ({1..10}), or characters ({a..z}). TEMPORARY FILE NAMES Option 1) /tmp/foobar.$$. The $$ variable is a read-only variable, from which a shell script can find its own Process Identifier, or PID. For example, here, my Bash shell's Process ID (PID) is 6046. So echo $$ gives 6046, and ps -fp 6046 shows the process via the ps command. Further the ps -fp $$ command shows the same result, but without everPOETRY IN CODE
So there's a poem in code, apparently going back to 1990, made almost entirely without words. For it to make sense as a poem, it helps if you read it out loud: Waka waka bang splat tick tick hash, Caret quote back-tick dollar dollar dash, Bang splat equal at dollar under-score, Percent splat waka waka tilde number four, Ampersand bracket THE SHELL SCRIPTING TUTORIALLOOPSA FIRST SCRIPTVARIABLESACADEMIC LINKSINTERACTIVE SHELLCASE This tutorial is written to help people understand some of the basics of shell script programming (aka shell scripting), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use. FUNCTIONS - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5. 13. Functions. One often-overlooked feature of Bourne shell script programming is that you can easily write functions for use within your script. This is generally done in one of two ways; with a simple script, the UNDERSTANDING SHELL SCRIPT VARIABLES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailedQUICK REFERENCE
Quick Reference - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 15. Quick Reference. This is a quick reference guide to the meaning of some of the less easily guessed commands and codes of shell scripts. By their nature, they are also quite difficult to find using search engines.ESCAPE CHARACTERS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As SUBSTITUTING STRINGS WITHIN VARIABLE VALUES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed CHANGING TO UPPERCASE OR LOWERCASE The ^ operator converts to uppercase, while , converts to lowercase. If you double-up the operators, ie, ^^ or ,,, it applies to the whole string; otherwise, it applies only to the first letter (that isn't absolutely correct - see "Advanced Usage" below - but for most uses, it's an adequate description). For example, if you want to ensure that FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS THE SHELL SCRIPTING TUTORIALLOOPSA FIRST SCRIPTVARIABLESACADEMIC LINKSINTERACTIVE SHELLCASE This tutorial is written to help people understand some of the basics of shell script programming (aka shell scripting), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use. FUNCTIONS - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5. 13. Functions. One often-overlooked feature of Bourne shell script programming is that you can easily write functions for use within your script. This is generally done in one of two ways; with a simple script, the UNDERSTANDING SHELL SCRIPT VARIABLES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailedQUICK REFERENCE
Quick Reference - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 15. Quick Reference. This is a quick reference guide to the meaning of some of the less easily guessed commands and codes of shell scripts. By their nature, they are also quite difficult to find using search engines.ESCAPE CHARACTERS
Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed TRAP - SHELL SCRIPTING TUTORIAL Buy this Shell Scripting Tutorial as a PDF for only $5 Trap Trap is a simple, but very useful utility. If your script creates temporary files, such as this simple script which replaces FOO for BAR in all files in the current directory, /tmp is clean when the script exits. LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As SUBSTITUTING STRINGS WITHIN VARIABLE VALUES Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed CHANGING TO UPPERCASE OR LOWERCASE The ^ operator converts to uppercase, while , converts to lowercase. If you double-up the operators, ie, ^^ or ,,, it applies to the whole string; otherwise, it applies only to the first letter (that isn't absolutely correct - see "Advanced Usage" below - but for most uses, it's an adequate description). For example, if you want to ensure that FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS THE SHELL SCRIPTING TUTORIAL This tutorial is written to help people understand some of the basics of shell script programming (aka shell scripting), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use.A FIRST SCRIPT
A First Script - Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 3. A First Script. For our first shell script, we'll just write a script which says "Hello World". We will then try to get more out of a Hello World program than any othertutorial you've
ECHO - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed LOOPS - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial. Buy this Shell Scripting Tutorial as a PDF for only $5. 7. Loops. Most languages have the concept of loops: If we want to repeat a task twenty times, we don't want to have to type in the code twenty times, with maybe a slight change each time. As VARIABLES - PART 3 - SHELL SCRIPTING TUTORIAL Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed EXIT CODES - SHELL SCRIPTING TUTORIAL Exit Codes. Exit codes are a number between 0 and 255, which is returned by any Unix command when it returns control to its parent process. Other numbers can be used, but these are treated modulo 256, so exit -10 is equivalent to exit 246, and exit 257 is equivalent to exit 1 . These can be used within a shell script to change the flow of FAILING ON ERRORS, WHILST ALSO CHECKING FOR ERRORS Shell Scripting Tutorial is this tutorial, in 88-page Paperback and eBook formats. Convenient to read on the go, and to keep by your desk as an ever-present companion. Shell Scripting: Expert Recipes for Linux, Bash and more is my 564-page book on Shell Scripting. The first half explains the features of the shell; the second half has real-world shell scripts, organised by topic, with detailed GENERATING SEQUENCES IN BASH Buy this tutorial as a PDF for only $5! All Shell Scripting Tips. 20 May 2015. Generating Sequences in Bash. A useful but underused feature of the Bash shell is called Brace Expansion.. It takes a few different forms, but basically, anything within the { braces } is expanded, either as a list ({apples,oranges,bananas}), a numerical sequence ({1..10}), or characters ({a..z}). TEMPORARY FILE NAMES Option 1) /tmp/foobar.$$. The $$ variable is a read-only variable, from which a shell script can find its own Process Identifier, or PID. For example, here, my Bash shell's Process ID (PID) is 6046. So echo $$ gives 6046, and ps -fp 6046 shows the process via the ps command. Further the ps -fp $$ command shows the same result, but without everPOETRY IN CODE
So there's a poem in code, apparently going back to 1990, made almost entirely without words. For it to make sense as a poem, it helps if you read it out loud: Waka waka bang splat tick tick hash, Caret quote back-tick dollar dollar dash, Bang splat equal at dollar under-score, Percent splat waka waka tilde number four, Ampersand bracket SHELL SCRIPTING TUTORIAL The Linux Shell Scripting Tutorial__
* __NEW: Shell Scripting Tips* __1. Introduction
* __2. Philosophy
* __3. A First Script * __4. Variables (Part 1)* __5. Wildcards
* __6. Escape Characters* __7. Loops
* __8. Test
* __9. Case
* __10. Variables (Part 2) * __11. Variables (Part 3) * __12. External Programs* __13. Functions
* __14. Hints and Tips * __15. Quick Reference * __16. Interactive Shell* __17. Exercises
* __Contact Me
SHELL SCRIPTING TUTORIAL A Bourne Shell Programming / Scripting Tutorial for learning about using the Unix shell. Learn Linux / Unix shell scripting by example along with the theory. I'll have you mastering Unix shell scripting inno time.
Buy this tutorial as a PDF ($5) * __NEW: Shell Scripting Tips* __1. Introduction
* __2. Philosophy
* __3. A First Script * __4. Variables (Part 1)* __5. Wildcards
* __6. Escape Characters* __7. Loops
* __8. Test
* __9. Case
* __10. Variables (Part 2) * __11. Variables (Part 3) * __12. External Programs* __13. Functions
* __14. Hints and Tips * __15. Quick Reference * __16. Interactive Shell* __17. Exercises
* __Publications
* __Contact Me
SHELL SCRIPTING TUTORIAL You can buy this tutorial to keep, as a Paperback or eBook from Amazon , or Buy this tutorial as a PDF ($5)x
Product from Amazon, Publisher may get a commissionAdChoices
Product from Amazon, Publisher may get a commission Shell Scripting Tutorial By STEVE PARKER (PAPERBACK - MAY 17, 2014)$9.99$9.99
Rated 5 out of 5 by 5 reviewers on Amazon.comBuy Now
1. INTRODUCTION
PURPOSE OF THIS TUTORIAL This tutorial is written to help people understand some of the basics of SHELL SCRIPT programming (aka SHELL SCRIPTING), and hopefully to introduce some of the possibilities of simple but powerful programming available under the Bourne shell. As such, it has been written as a basis for one-on-one or group tutorials and exercises, and as a reference for subsequent use. GETTING THE MOST RECENT VERSION OF THIS TUTORIAL You are reading Version 2.1b, last updated 11th February 2018. The most recent version of this tutorial is always available at: https://www.shellscript.sh . Always check there for the latest copy. (If you are reading this at some different address, it is probably a copy of the real site, and therefore may beout of date).
A BRIEF HISTORY OF SH Steve Bourne wrote the Bourne shell which appeared in the Seventh Edition Bell Labs Research version of Unix. Many other shells have been written; this particular tutorial concentrates on the Bourne and the Bourne Again shells. Other shells include the Korn Shell (ksh), the C Shell (csh), and variations such as tcsh. This tutorial does _not_ cover those shells.AUDIENCE
This tutorial assumes some prior experience; namely: * USE OF an INTERACTIVE Unix/Linux shell * MINIMAL PROGRAMMING KNOWLEDGE - use of variables, functions, is useful background knowledge * Understanding of SOME Unix/Linux commands, and COMPETENCE in using SOME of the MORE COMMON ones. (_ls_, _cp_, _echo_, etc) * Programmers of RUBY, PERL, PYTHON, C, PASCAL, or any programming language (even BASIC) who can maybe read shell scripts, but don't feel they understand exactly how they work. You may want to review some of the feedback that this tutorial has received to see how useful you might find it. TYPOGRAPHICAL CONVENTIONS USED IN THIS TUTORIAL Significant words will be written in _italics_ when mentioned for thefirst time.
Code segments and script output will be displayed as monospaced text. Command-line entries will be preceded by the Dollar sign ($). If your prompt is different, enter the command: PS1="$ " ; export PS1 Then your interactions should match the examples given (such as ./my-script.sh below). Script output (such as "Hello World" below) is displayed at the startof the line.
$ echo '#!/bin/sh' > my-script.sh $ echo 'echo Hello World' >> my-script.sh $ chmod 755 my-script.sh$ ./my-script.sh
Hello World
$
Entire scripts will be shown with a gray background, and include a reference to the plain text of the script, where available: -------------------------my-script.sh
#!/bin/sh
# This is a comment! echo Hello World # This is a comment, too! ------------------------- Note that to make a file executable, you must set the eXecutable bit, and for a shell script, the Readable bit must also be set: $ chmod a+rx my-script.sh$ ./my-script.sh
Next: Philosophy __
YOU CAN BUY THE CONTENT OF THIS TUTORIAL AS A PDF TO DOWNLOAD TO ALLOF YOUR DEVICES!
Loading...
CONTACT
You can mail me with this form. If you expect a reply, please ensure that the address you specify is valid. Don't forget to include the simple addition question at the end of the form, to prove that you area real person!
------------------------- Copyright © 2000 - 2019 Steve Parker__
Details
3