Bash - Revision history

Jfreier at 21:05, 3 August 2023

2023-08-03T21:05:10Z

2023-06-26T18:40:59Z

2023-06-26T18:39:34Z

2023-06-26T17:24:22Z

2023-03-22T19:27:24Z

2023-02-21T17:27:49Z

2023-02-13T20:19:25Z

2023-02-13T18:23:01Z

2022-09-07T16:34:15Z

2022-05-18T14:26:09Z

← Older revision		Revision as of 21:05, 3 August 2023
Line 78:		Line 78:
	echo "arg: $var"		echo "arg: $var"
	done		done
		+
		+	== Previous command arguments ==
		+	To the the arguments from the previous command.
		+
		+	!^ first argument
		+	!$ last argument
		+	!* all arguments
		+	!:2 second argument
		+
		+	!:2-3 second to third arguments
		+	!:2-$ second to last arguments
		+	!:2* second to last arguments
		+	!:2- second to next to last arguments
		+
		+	!:0 the command
		+	!! repeat the previous line, good with sudo

← Older revision		Revision as of 18:40, 26 June 2023
Line 70:		Line 70:
	To immediately exit a script when an error happens use the following command.		To immediately exit a script when an error happens use the following command.
	set -e		set -e
		+
		+	== Loop through argument variables. ==
		+	This sniplet will loop through the arguments of a script.
		+
		+	for var in "$@"
		+	do
		+	echo "arg: $var"
		+	done

← Older revision		Revision as of 18:39, 26 June 2023
Line 66:		Line 66:
	Command		Command
	# JOHN_FREIER=1 ./echo_env_var.sh		# JOHN_FREIER=1 ./echo_env_var.sh
		+
		+	== Exit script on error ==
		+	To immediately exit a script when an error happens use the following command.
		+	set -e

← Older revision		Revision as of 17:24, 26 June 2023
Line 53:		Line 53:

	This new screen is actually LESS and it just needs different flags.		This new screen is actually LESS and it just needs different flags.
		+
		+	== Temporary Environment Variables for Scripts ==
		+	If you have a script or command that uses environment variables, you can set one time variables be just prefixing the comment with the environment variable and command.
		+
		+	Example
		+
		+	echo_env_var.sh
		+	#!/bin/bash
		+
		+	echo $JOHN_FREIER
		+
		+	Command
		+	# JOHN_FREIER=1 ./echo_env_var.sh

← Older revision		Revision as of 19:27, 22 March 2023
Line 45:		Line 45:
	== To set the CD Path ==		== To set the CD Path ==
	$CDPATH		$CDPATH
		+
		+	== Alternative Screen ==
		+	This happens when you run a command a new screen appears and then is closed when done.
		+
		+	To turn this feature off.
		+	export LESS="-FRX"
		+
		+	This new screen is actually LESS and it just needs different flags.

← Older revision		Revision as of 17:27, 21 February 2023
Line 42:		Line 42:
	This will print all commands that are ran.		This will print all commands that are ran.
	set -x		set -x
		+
		+	== To set the CD Path ==
		+	$CDPATH

← Older revision		Revision as of 20:19, 13 February 2023
Line 38:		Line 38:
	To bring a command line in to VIM for editing		To bring a command line in to VIM for editing
	ctrl+x ctrl+e		ctrl+x ctrl+e
		+
		+	== Echo commands ==
		+	This will print all commands that are ran.
		+	set -x

← Older revision		Revision as of 18:23, 13 February 2023
Line 34:		Line 34:
	To create an alias.		To create an alias.
	alias myproject='cd /Users/jfreier/Projects/my_project'		alias myproject='cd /Users/jfreier/Projects/my_project'
		+
		+	== Edit in VIM ==
		+	To bring a command line in to VIM for editing
		+	ctrl+x ctrl+e

← Older revision		Revision as of 16:34, 7 September 2022
Line 1:		Line 1:
		+
		+	== Keyboard Shortcuts ==
		+	To send the current line to VIM for editing.
		+	ctrl+x ctrl+e

	== One line conditional ==		== One line conditional ==

← Older revision		Revision as of 14:26, 18 May 2022
Line 19:		Line 19:
	or		or
	export PS1="${ret_status} %{$fg[cyan]%}%c%{$reset_color%} $(git_prompt_info)"		export PS1="${ret_status} %{$fg[cyan]%}%c%{$reset_color%} $(git_prompt_info)"
		+
		+
		+	== Alias ==
		+	To find the command associated with an alias.
		+	type [alias_name]
		+
		+	To list all aliases, just type 'alias'.
		+	alias
		+
		+	To create an alias.
		+	alias myproject='cd /Users/jfreier/Projects/my_project'