Replace Every occurrence of a word in a file

perl -p -i -e 's/this/that/g' filename
Replace 'this' with 'that'

2
By: rader5
2009-08-09 20:53:50

What Others Think

What make this better than using sed -i (for inplace changes) ?
CodSpirit · 569 weeks and 5 days ago
sed < perl perl regexes are the most full-featured of any language bar none. First there was sed, then came perl which built on what awk and sed had to offer and made something out of them which is now so much more. What you don't see here is the unbelievably feature-rich syntax and powerful (posix-compliant) extensions of perl's regexes. For more on that, please refer to the manpage "perlre" or simply type "perldoc perlre" on a machine where the perl documentation is installed. You can also check out The book by Jeffrey Friedl "Mastering Regular Expressions" @rader5 - this is a duplicate of previously contributed commands. Double-check next time. Thanks for contribulting.
linuxrawkstar · 569 weeks and 4 days ago
To my knowledge only the GNU implementation of sed has this option. What about using a file editor instead of abusing a stream editor? echo "%s/this/that/g\nwq" | ed filename This also works with ex in place of ed. If the shell is bash you could also use ed filename <<< "%s/this/that/g^Jwq^J" again with the option of using ex in place of vi. The command requires you to enter literal Ctrl-J - to do so use Ctrl-V Ctrl-J in the default (emacs) input mode or Ctrl-Q Ctrl-J in the (alternative) vi input mode.
penpen · 569 weeks and 1 day ago
To my knowledge only the GNU implementation of sed has this option. What about using a file editor instead of abusing a stream editor? echo "%s/this/that/g\nwq" | ed filename This also works with ex in place of ed. If the shell is bash you could also use ed filename <<< "%s/this/that/g^Jwq^J" again with the option of using ex in place of vi. The command requires you to enter literal Ctrl-J - to do so use Ctrl-V Ctrl-J in the default (emacs) input mode or Ctrl-Q Ctrl-J in the (alternative) vi input mode.
penpen · 569 weeks and 1 day ago
still no means to remove such accidents :(
penpen · 569 weeks and 1 day ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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