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How do you delete a comment in Linux?
Following grep command assumes that each comment starts with single # character at the beginning of the line. To remove or ignore all comments from a file a following grep command can be used: $ grep -v ^\# config.
How do I remove a word using SED?
How do I match and remove (delete) the words “ssh_args=-p 1222” from config file using sed command under Linux or Unix like operating systems? You can use the the substitute sed command changes all occurrences of the “ssh_args=-p 1222”. The same command can be used to delete the required words.
How to remove comment lines and empty lines in SED?
(3) Lastly, on OSX at least, the @paxdiablo solution in which the first clause turns comment lines into blank lines, and the second clause strips blank lines (including what were originally comments) doesn’t work. It seems to be more portable to make both clauses /d delete actions as I’ve done.
How to delete the first line in a file using SED?
You can delete the first line from a file using the same syntax as described in the previous example. You have to put N=1 which will remove the first line. $ sed ‘ 1d ‘ testfile.txt To delete the last line from a file using the below command with ($) sign that denotes the last line of a file.
How to delete comments from the beginning of a line?
If you want to change it in place, add the -i switch: This will delete from any # to the end of the line, ignoring any context. If you use # anywhere where it’s not a comment (like in a string), it will delete that too. If comments can only start at the beginning of a line, do something like this:
How to delete C style comments in Linux?
So you could do something like to first delete lines that consist entirely of // characteristic_comment_to_delete, then substitute any remaining occurrences. (I changed your & to # to avoid confusion with the sed & replacement operator).