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- obselete
- h shell scripting obsolete deprecated outdated}} This (incomplete) page describes some syntax and comma... iscussion of the rationale is beyond the scope of this page. See the [[scripting:nonportable | portabili... y page]] for a discussion on portability issues. This first table lists syntax that is tolerated by Bas... ripts should never use them. None of the items on this list are specified by the most current version of
- color
- re exists common confusion about terminal colors. This is what we have right now: - Plain ASCII \\ - AN... ach of them defined as a 24-bit (888 rgb) color. This means that current support can only display 256 d... lor palette. They just specify the color itself. This is a good test case: <code bash> printf "\x1b[38... e.org/browse/vte/tree/perf/img.sh\\ - or just run this:\\ <code sh> awk 'BEGIN{ s="/\\/\\/\\/\\/\\"
- truecolor
- re exists common confusion about terminal colors. This is what we have right now: - Plain ASCII - ANSI ... ach of them defined as a 24-bit (888 rgb) color. This means that current support can only display 256 d... lor palette. They just specify the color itself. This is a good test case: <code bash> printf "\x1b... ome.org/browse/vte/tree/perf/img.sh - or just run this: <code sh> awk 'BEGIN{ s="/\\/\\/\\/\\/\
- scripting
- han "if something breaks, I know how to fix it". This is not a bible, of course. But I have seen so muc... "head" and a "body" that contains command lists. This type of compound command is relatively easy to in... OMMANDS BODY_END </code> == if/then/elif/else == This construct is a bit special, because it has keywor... The visually appealing way is to indent them like this: <code> if ...; then ... elif ...; then ...
- basics
- e bash> #!/bin/bash echo "Hello world..." </code> This is interpreted by the kernel ((under specific cir... ings to stderr and only program output to stdout. This enables the user to decide if they want to see no... M''|''UID''|''USER''|''USERNAME''|''XAUTHORITY''| This list is incomplete. **The safest way is to use al... exit code and reports it to the operating system. This exit code can be utilized by Bash. You can show i
- behaviours
- t reads and executes commands from ''~/.bashrc''. This file should contain, for example, aliases, since ... llows the POSIX(r) standard for startup files. In this mode, **interactive shells** expand the [[syntax:... re-search `$PATH' to find the new location. This is also available with `shopt -s checkhash'.... 9. The default history file is `~/.sh_history' (this is the default value of `$HISTFILE'). 10.