Complete shell scripting for Automation | sed command regex with \s \t . * \+ \? and \

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Creating patterns for regex with special characters of \s \t . * \+ \? and \
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[@vishwas22khare]

This is the only explaination .on internet for clarity ....this is so crystal clear
Thanks a lot sir 🙏

[@sadanb4876]

Great explained...Much thanks bro for uploading this video

[@srinipulavarthi8005]

Excellent

[@gt-h]

Cool

[@kukilp213]

'2007','abc'
I can find '2007' or 'abc' using command > sed -n '//p' filename.txt
But when I add the comma , or the entire line altogether. It can't find. Please help.