Linux Tips - Revision history

Brianegge at 13:16, 8 October 2013

2013-10-08T13:16:44Z

← Older revision		Revision as of 13:16, 8 October 2013
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			== compopt ==

			Getting this error:
			<geshi lang="bash">
			compopt -o filenames
			bash: compopt: command not found
			</geshi>

			Fix: You are using bash 3.0, try using bash 4.0+

	== Remove _2 files ==		== Remove _2 files ==
	Mac creates _2 when ever you copy a file the second time.		Mac creates _2 when ever you copy a file the second time.

2012-03-21T01:38:26Z

← Older revision		Revision as of 01:38, 21 March 2012
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			== Remove _2 files ==
			Mac creates _2 when ever you copy a file the second time.
			<geshi lang="bash">
			find . -name "*_2.???" -type f \| while read f; do g="$(echo "$f" \| sed -e 's/_2//;')"; if [[ -f "$g" && $(md5sum "$f" \| awk '{ print $1; }') = $(md5sum "$g" \| awk '{ print $1; }') ]]; then rm "$f"; fi; done
			</geshi>

	== Find duplicate files ==		== Find duplicate files ==

2012-03-03T16:10:49Z

← Older revision		Revision as of 16:10, 3 March 2012
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			== Find duplicate files ==

			<geshi lang="bash">
			find . -type f -print0 \| xargs -0 -n1 md5sum \| sort -k 1,32 \| guniq -w 32 -d --all-repeated=separate \| sed -e 's/^[0-9a-f]\ //;'
			</geshi>

	== Recursive file search ==		== Recursive file search ==

2010-01-18T22:28:08Z

← Older revision		Revision as of 22:28, 18 January 2010
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			== Recursive file search ==

			Quite often I want to search for text in a source directory. The following bash function searches all files except those in the .svn directories.

			<geshi lang="bash">
			ffind ()
			{
			find . -name ".svn" -prune -o -exec grep --color=auto "$@" {} +
			}
			</geshi>

	== append your ssh key with one command ==		== append your ssh key with one command ==

2010-01-05T05:02:32Z

Verify all the jar's in the classpath exist

← Older revision		Revision as of 05:02, 5 January 2010
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	==Verify all the jar's in the classpath exist==		==Verify all the jar's in the classpath exist==

	<~~pre~~>		<geshi lang="bash">
	# Warn if any jar's are missing		# Warn if any jar's are missing
	echo $CLASSPATH \| tr ":" "\n" \| xargs cksum > /dev/null		echo $CLASSPATH \| tr ":" "\n" \| xargs cksum > /dev/null
	</~~pre~~>		</geshi>

			Note: see the much better ruby script [[Classpathchecker.rb]] which does the same thing and also works on Windows.

2010-01-05T05:00:42Z

Use sed to remove ANSI colors

← Older revision		Revision as of 05:00, 5 January 2010
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	== Use sed to remove ANSI colors ==		== Use sed to remove ANSI colors ==
	<~~pre~~>		<geshi lang="bash">
	# better way - thanks timmah		# better way - thanks timmah
	echo -e '\e[31mfoo\e[0m' \| sed 's/\x1b\[[0-9]\{1,2\}$;[0-9]\{1,2\}$\{0,2\}m//g'		echo -e '\e[31mfoo\e[0m' \| sed 's/\x1b\[[0-9]\{1,2\}$;[0-9]\{1,2\}$\{0,2\}m//g'
	# old way, useing ctrl-v ctrl-[		# old way, useing ctrl-v ctrl-[
	echo -e '\e[31mfoo\e[0m' \| sed 's/^[\[[0-9]\+m//g'		echo -e '\e[31mfoo\e[0m' \| sed 's/^[\[[0-9]\+m//g'
	</~~pre~~>		</geshi>

	Note: this works great on Linux, but not on OS X. Must be some difference betweent he GNU sed and BSD sed.		Note: this works great on Linux, but not on OS X. Must be some difference betweent he GNU sed and BSD sed.

2008-09-15T07:12:45Z

← Older revision		Revision as of 07:12, 15 September 2008
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			== append your ssh key with one command ==

			<geshi lang="bash">
			cat ~/.ssh/id_rsa.pub \| ssh example.com bash -c "cat >> ~/.ssh/authorized_keys"
			</geshi>

	== vim ==		== vim ==

2008-02-27T12:21:50Z

← Older revision		Revision as of 12:21, 27 February 2008
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			== vim ==

			To install my vim theme:
			<geshi lang="bash">
			mkdir -p ~/.vim/color
			cd ~/.vim/color
			wget http://www.cs.cmu.edu/~maverick/VimColorSchemeTest/PapayaWhip.vim
			echo "colorscheme PapayaWhip" >> ~/.vimrc
			</geshi>

	== Remove CVS RCS Headers ==		== Remove CVS RCS Headers ==

2008-02-26T11:33:15Z

Use sed to remove ANSI colors

← Older revision		Revision as of 11:33, 26 February 2008
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	== Use sed to remove ANSI colors ==		== Use sed to remove ANSI colors ==
	<pre>		<pre>
			# better way - thanks timmah
			echo -e '\e[31mfoo\e[0m' \| sed 's/\x1b\[[0-9]\{1,2\}$;[0-9]\{1,2\}$\{0,2\}m//g'
			# old way, useing ctrl-v ctrl-[
	echo -e '\e[31mfoo\e[0m' \| sed 's/^[\[[0-9]\+m//g'		echo -e '\e[31mfoo\e[0m' \| sed 's/^[\[[0-9]\+m//g'
	</pre>		</pre>

	Note, ~~I couldn't figure out how to make~~ sed ~~accept a \e or \033 for an escape character, so I typed 'Ctrl-V Ctrl-[' in my shell to create an escape character inline~~.		Note: this works great on Linux, but not on OS X. Must be some difference betweent he GNU sed and BSD sed.

	== Redirecting sudo output ==		== Redirecting sudo output ==

2007-11-13T05:17:14Z

← Older revision		Revision as of 05:17, 13 November 2007
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			== Remove CVS RCS Headers ==

			Not everyone loves having RCS keywords in their files. Here's a one liner to remove them all from a code base.
			<geshi lang="bash">
			find . -type f -name ".java" \| xargs grep -lE '\$(Header\|Revision\|Date\|Id\|Author):[^$]\$' \| \
			xargs sed -rni '' -e '/\$(Header\|Revision\|Date\|Id\|Author):[^$]*\$/!p'
			</geshi>

	== Damn Small Linux on Dell Latitude D620 ==		== Damn Small Linux on Dell Latitude D620 ==