Difference between revisions of "Sed"
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[https://man7.org/linux/man-pages/man1/sed.1.html sed] is a unix command for stream data editor. | [https://man7.org/linux/man-pages/man1/sed.1.html sed] is a unix command for stream data editor. | ||
= | =Special Characters= | ||
When dealing with special characters, use a different set of separators. For example: when dealing with <code>'</code>, use the following command: | When dealing with special characters, use a different set of separators. For example: when dealing with <code>'</code>, use the following command: | ||
sed "/'/d" | sed "/'/d" OriginalTextualContent.txt > NoSeparator.txt | ||
==Two or more replacement rules== | |||
If one needs to replace more than one set of characters, one can use the following expression: | |||
sed -e "/'/d" -e "s/,/|/g" OriginalTextualContent.txt > NoSeparator.txt | |||
Note the two <code>-e</code> prefixes. These prefixes defines the multiple substitution expressions. | |||
For more explainations, see<ref>{{:Video/Learning Sed Is Beneficial For Linux Users}}</ref> | |||
[https://youtu.be/EACe7aiGczw?t=656 Click here to see the portion that talks about special characters] | |||
==Pattern matching with . * and $== | |||
To remove some string after certain character, say <code>|</code>, see the following example: | |||
echo "Module:734556565|Module:certainModuleName3" | sed "s/|.*$//" | |||
Output: | |||
Module:734556565 | |||
To learn more about these pattern defining instructions, see [https://en.wikipedia.org/wiki/Sed#Other_sed_commands Sed Commands]. | |||
=Quick Tutorial= | |||
This 8 minute video<ref>{{:Video/How to use Sed substitutions, from basic to advanced - Yes, I Know IT ! Ep 08}}</ref> could significantly speed up your understanding of [[sed]]. | |||
<noinclude> | |||
=References= | |||
<references/> | |||
=Related Pages= | |||
[[Category:Unix Command]] | [[Category:Unix Command]] | ||
</noinclude> | |||
Latest revision as of 08:49, 28 January 2022
sed is a unix command for stream data editor.
Special Characters
When dealing with special characters, use a different set of separators. For example: when dealing with ', use the following command:
sed "/'/d" OriginalTextualContent.txt > NoSeparator.txt
Two or more replacement rules
If one needs to replace more than one set of characters, one can use the following expression:
sed -e "/'/d" -e "s/,/|/g" OriginalTextualContent.txt > NoSeparator.txt
Note the two -e prefixes. These prefixes defines the multiple substitution expressions.
For more explainations, see[1] Click here to see the portion that talks about special characters
Pattern matching with . * and $
To remove some string after certain character, say |, see the following example:
echo "Module:734556565|Module:certainModuleName3" | sed "s/|.*$//"
Output:
Module:734556565
To learn more about these pattern defining instructions, see Sed Commands.
Quick Tutorial
This 8 minute video[2] could significantly speed up your understanding of sed.
References
- ↑ DistroTube, ed. (Jun 25, 2021). Learning Sed Is Beneficial For Linux Users. local page: DistroTube.
- ↑ Yes, I Know IT !, ed. (Mar 2, 2017). How to use Sed substitutions, from basic to advanced - Yes, I Know IT ! Ep 08. local page: Yes, I Know IT !.