CODEWITHSUNDEEP
bash
Tomcomm
Tomcomm

Reputation: 233

How can I replace an entire line containing a string?

Say I have a file called file.txt that contains

abc
post_max_size = 100M
def

I need a script that will find the line containing post_max_size and replace the entire line with post_max_size = 50M. So it will result as:

abc
post_max_size = 50M
def

Thanks

Upvotes: 0

Views: 1488

Answers (1)

Shawn Chin
Shawn Chin

Reputation: 86974

[me@home]$ cat file.txt 
abc
post_max_size = 100M
def

[me@home]$ sed -i 's/.*post_max_size.*/post_max_size = 50M/' file.txt 
[me@home]$ cat file.txt
abc
post_max_size = 50M
def

Upvotes: 2

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