Bash script final
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Bash is a Unix shell written by Brian Fox as a free replacement for the Bourne shell, released in 1989. It explores Bash scripts which allow users to create and run shell scripts, covering topics like variables, conditional statements, loops, functions, string manipulation, I/O redirection, and special commands like grep, find, awk, sed, and alias. The document provides examples and explanations of how to use these Bash scripting elements and commands.
Bash script final
- 1. Bash Script
- 3. ? Bash is a Unix shell written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell . ? Released in 1989,it has been distributed widely as the shell for the GNU operating system and as a default shell on Linux and Mac OS X.
- 4. Lets explore Bash ١
- 5. 1.Variables
- 7. Global vs. Local variables
- 10. If/else
- 11. Elif
- 13. Case
- 14. b.Loops
- 15. While
- 18. For(with arrays)
- 19. Until
- 20. 3.Bash functions
- 21. Syntax to create a bash function:
- 23. Functions with returned values
- 25. a.String length
- 28. d.Find and Replace String Values
- 29. e.Replace all the matches
- 30. f.Replace beginning and end
- 31. f.Replace beginning and end
- 37. c.Pipes |
- 40. a.Grep ? Is used to search a characters chain within a file ? -v displays the lines that do not contain the string ? -c count the number of lines containing the string ? -n each line containing the string is numbered ? -x the line that exactly matches the string ? -l displays the names of files that contain the string
- 42. b.Find ? Is used to fined files based on specific criteria. ? Syntax: find <folder> <search criteria> ? -name search by name ? -perm search by access rihghts on file, ? -user search by files owner, ? -group search by files group,
- 46. c.Awk ? Is used to print specific lines and columns from a file, with conditions. ? Syntax : awk '{print $NF}' file
- 49. d.Sed ? The SED UNIX Command in Linux enables you to work with the text inside your files and can be used to perform different functions to it. ? Syntax :
- 52. e.Alias ? Is used to enable a replacement of a command by another string ? Syntax : alias myalias=command_name
- 53. Thank you for your attention