Aug 2, 2023 · Syntax is similar to sed, but certainly not exactly the same. Even if you don't have a -i supporting sed, you can easily write a script to do the work for you. Instead of sed -i 's/foo/bar/g' file, you could do inline file sed 's/foo/bar/g'. Such a script is trivial to write. For example:

Aug 30, 2013 · sed 's/"p"/0/g' file.txt > file.txt Unfortunately because of the nature of redirects the above will simply produce a blank file. Instead a temp file must be created for the output which later overwrites the original file something like this:

You need to quote \[.*^$/ in the regular expression part of the s command and \&/ in the replacement part, plus newlines.

Jun 3, 2015 · In your example sed 's/foo/bar/' and sed -e 's/foo/bar/' are equivalent. In both cases s/foo/bar/ is the script that is executed by sed. The second option is more explicit, but that is probably not the reason that you often see -e used. The reason for that is that -e makes it possible to use more than one script with the same invocation of sed ...

In GNU sed, looks like there's no space between -i and its argument, but in BSD sed there is… so BSD -i '' 's/foo/bar/' is equivalent to GNU -i 's/foo/bar/. – paulmelnikow Commented Feb 18, 2014 at 22:03

The single quotes around the sed body will prevent the shell from substituting any variables, so the $ on the left-hand side is escaped only to prevent its special regular expression meaning. – glenn jackman

Oct 19, 2012 · Great works a treat. I guess _ in there means to look for numbers only after the underscore? In this instance I can always expect an underscore so this will work.

Oct 21, 2010 · sed is the Stream EDitor. It can do a whole pile of really cool things, but the most common is text replacement. The s,%,$,g part of the command line is the sed command to execute. The s stands for substitute, the , characters are delimiters (other characters can be used; /, : and @ are popular).

The sed utility is a batch (noninteractive) editor. The sed commands are usually stored in a script-file . . .although you can give simple sed commands from the command line . . . Man page for sed (GNU sed) 4.2.2 : Sed is a stream editor.

Jun 11, 2015 · First, understanding the sed expression at hand. s/pattern/replacement/flags is the a sed command, described in detail in man sed. In this case, pattern is a regular expression; replacement is what that pattern gets replaced with when/where found; and flags describe details about how that replacement should be done.