CODEWITHSUNDEEP
shellsedcommand-line-interface
tonix
tonix

Reputation: 6939

How does this sed command works?

I came across the following sed command which I found here https://github.com/shama/grunt-hub:

ps -ef | sed -n '/grunt/{/grep/!p;}'

Could someone explain me how does the sed part work? What's the purpose of {/grep/!p;}?

Thanks for the attention!

Upvotes: 1

Views: 152

Answers (1)

P....
P....

Reputation: 18381

compare the output of following two commands:

ps -ef | sed -n '/grunt/p' and ps -ef | sed -n '/grunt/{/grep/!p;}'.

You will notice later is not printing one additional like which contains process id of the grep command you hit. This would be equivalent to:

ps -ef |grep grunt |grep -v grep

Its like print all the lines containing grunt but not the line also containing grep in it

Upvotes: 2

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