What is the purpose of -e in sed command? - Unix & Linux Stack …
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.
unix - What does sed -i option do? - Stack Overflow
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:
How to use variables in a command in sed? - Stack Overflow
@tripleee While I'm certain that this would be a duplicate of numerous other questions, the one that you've pointed to isn't the best one since it doesn't contain slashes in the variable.
unix - sed edit file in-place - Stack Overflow
Versions of sed that support the -i option for editing a file in place write to a temporary file and then rename the file. Alternatively, you can just use ed. For example, to change all occurrences of foo to bar in the file file.txt, you can do: echo ',s/foo/bar/g; w' | tr \; '\012' | ed -s file.txt. Syntax is similar to sed, but certainly not ...
regular expression - Using sed to find and replace complex string ...
You need to quote \[.*^$/ in the regular expression part of the s command and \&/ in the replacement part, plus newlines.
How can I replace each newline (\n) with a space using sed?
Sed works like this: sed reads one line at a time, chops off the terminating newline, puts what is left into the pattern space where the sed script can address or change it, and when the pattern space is printed, appends a newline to stdout (or to a file). If the pattern space is entirely or partially deleted with 'd' or 'D', the
Boolean OR in sed regex - Stack Overflow
Feb 11, 2013 · sed uses basic regular expressions by default, enabling use of extended regular expressions is implementation dependent, e.g. with BSD sed you use the -E switch, GNU sed has it documented as -r, but -E works as well.
linux - sed with special characters - Stack Overflow
Backslash works fine. echo '*.cpp' | sed 's/\*//' => .cpp. If you're in a shell, you might need to double escape $, since it's a special character both for the shell (variable expansion) and for sed (end of line) Do not escape ( or ); that will actually make them them special (groups) in sed.
Environment variable substitution in sed - Stack Overflow
May 5, 2017 · Actually, the simplest thing (in GNU sed, at least) is to use a different separator for the sed substitution (s) command.
sed - How to insert text after a certain string in a file? - Unix ...
go to line 4, start insert mode (i) add *inserted text* (including the newline) exit insert mode (.) write the file (w) and quit ed (q) You can put this all together in one command using a here string: ed filename.txt <<< '4i. *inserted text*.