Bash sed - Revision history

Chubbard: /* Inline commenting by line range */

2025-12-30T17:44:10Z

Inline commenting by line range

← Older revision		Revision as of 10:44, 30 December 2025
Line 43:		Line 43:
	== Inline commenting by line range ==		== Inline commenting by line range ==
	This is an interesting one. I needed to add the # character from line 483 until 828 but still keep the data. This sed was one I had never used but will need to remember.. Very useful		This is an interesting one. I needed to add the # character from line 483 until 828 but still keep the data. This sed was one I had never used but will need to remember.. Very useful

			It did successfully comment out all the lines without breaking stuff.
	<pre>		<pre>
	sed '483,828 s/^/#/' clean_me.yml > filteredCleanFile.yml		sed '483,828 s/^/#/' clean_me.yml > filteredCleanFile.yml

Chubbard: /* Strip leading and trailing whitespace */

2025-12-30T17:43:20Z

Strip leading and trailing whitespace

← Older revision		Revision as of 10:43, 30 December 2025
Line 39:		Line 39:
	<pre>		<pre>
	\| sed 's/^[[:blank:]]//;s/[[:blank:]]$//'		\| sed 's/^[[:blank:]]//;s/[[:blank:]]$//'
			</pre>

			== Inline commenting by line range ==
			This is an interesting one. I needed to add the # character from line 483 until 828 but still keep the data. This sed was one I had never used but will need to remember.. Very useful
			<pre>
			sed '483,828 s/^/#/' clean_me.yml > filteredCleanFile.yml
	</pre>		</pre>


	[[Category:bash]]		[[Category:bash]]

Chubbard: /* Replace in file only when matching regex */

2024-10-17T16:21:29Z

Replace in file only when matching regex

← Older revision		Revision as of 09:21, 17 October 2024
Line 32:		Line 32:
	bar=5		bar=5
	</pre>		</pre>


			== Strip leading and trailing whitespace ==
			I like this a little better than the awk version which is shorter. However this makes sense in my head.

			<pre>
			\| sed 's/^[[:blank:]]//;s/[[:blank:]]$//'
			</pre>


	[[Category:bash]]		[[Category:bash]]

Chubbard at 19:53, 11 December 2023

2023-12-11T19:53:16Z

← Older revision		Revision as of 12:53, 11 December 2023
Line 13:		Line 13:
	* will match ALL until match ( and remove match string LINE)		* will match ALL until match ( and remove match string LINE)
	</pre>		</pre>
			== Strip pattern match ==
	<pre>		<pre>
	echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'		echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'

Chubbard at 19:52, 11 December 2023

2023-12-11T19:52:40Z

← Older revision		Revision as of 12:52, 11 December 2023
Line 1:		Line 1:
	==== Useful sed commands ====		==== Useful sed commands ====

			== Ignore until EOF ==
			<pre>
	cat foo \| sed "1,/^stringMatch/d"		cat foo \| sed "1,/^stringMatch/d"
	* Will ignore all before string match until EOF		* Will ignore all before string match until EOF
	* stringMatch must be start of line (^)		* stringMatch must be start of line (^)
			</pre>

			== Match all until EOF ==
			<pre>
	cat foo \| sed "/^stringMatch2/q" \| grep -v "^stringMatch2"		cat foo \| sed "/^stringMatch2/q" \| grep -v "^stringMatch2"
	* will match ALL until match ( and remove match string LINE)		* will match ALL until match ( and remove match string LINE)
			</pre>
	<pre>		<pre>
	echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'		echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'

Chubbard at 19:18, 11 December 2023

2023-12-11T19:18:38Z

← Older revision		Revision as of 12:18, 11 December 2023
Line 13:		Line 13:
	* Will strip out IP addresses beginning with 172.		* Will strip out IP addresses beginning with 172.

			== Replace in file only when matching regex ==
			This will only alter values if the first arg matches
			Nice for changing values in a script or ini
			<pre>
			sed -ie '/^foo/s/4/20/g' /tmp/b

			cat /tmp/b
			foo=20
			foo=4
			bar=5
			bar=5
			</pre>

	[[Category:bash]]		[[Category:bash]]

Chubbard at 18:22, 24 August 2022

2022-08-24T18:22:45Z

← Older revision		Revision as of 11:22, 24 August 2022
Line 7:		Line 7:
	* will match ALL until match ( and remove match string LINE)		* will match ALL until match ( and remove match string LINE)

			<pre>
	echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'		echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'
	192.168.15.58 123.10.130.201		192.168.15.58 123.10.130.201
			</pre>
	* Will strip out IP addresses beginning with 172.		* Will strip out IP addresses beginning with 172.


	[[Category:bash]]		[[Category:bash]]

Chubbard at 18:22, 24 August 2022

2022-08-24T18:22:20Z

← Older revision		Revision as of 11:22, 24 August 2022
Line 6:		Line 6:
	cat foo \| sed "/^stringMatch2/q" \| grep -v "^stringMatch2"		cat foo \| sed "/^stringMatch2/q" \| grep -v "^stringMatch2"
	* will match ALL until match ( and remove match string LINE)		* will match ALL until match ( and remove match string LINE)

			echo "192.168.15.58 172.17.0.1 123.10.130.201" \| sed 's/172.[[:digit:]]\+.[[:digit:]]\+.[[:digit:]]\+//'
			192.168.15.58 123.10.130.201
			* Will strip out IP addresses beginning with 172.


	[[Category:bash]]		[[Category:bash]]

Chubbard at 22:01, 14 June 2022

2022-06-14T22:01:09Z

← Older revision		Revision as of 15:01, 14 June 2022
Line 3:		Line 3:
	* Will ignore all before string match until EOF		* Will ignore all before string match until EOF
	* stringMatch must be start of line (^)		* stringMatch must be start of line (^)

			cat foo \| sed "/^stringMatch2/q" \| grep -v "^stringMatch2"
			* will match ALL until match ( and remove match string LINE)

	[[Category:bash]]		[[Category:bash]]

Chubbard: Created page with "==== Useful sed commands ==== cat foo | sed "1,/^stringMatch/d" * Will ignore all before string match until EOF * stringMatch must be start of line (^) Category:bash"

2022-06-14T20:03:54Z

Created page with "==== Useful sed commands ==== cat foo | sed "1,/^stringMatch/d" * Will ignore all before string match until EOF * stringMatch must be start of line (^) Category:bash"

New page

==== Useful sed commands ====
cat foo | sed "1,/^stringMatch/d"
* Will ignore all before string match until EOF
* stringMatch must be start of line (^)

[[Category:bash]]