sed -e '/^#/d' -e 's/#.*$//' in

Remove comments from files

Use sed to remove comments from a file. In this example the comments begin with #. The command '/^#/d' remove line starting with #. The command 's/#.*$//' remove comments at end of lines.

7
By: agambier
2012-01-25 15:05:57
sed

1 Alternatives + Submit Alt

What Others Think

Just take care when the '#' is used for any other purpose than commenting ! - in a string - in bash substitution like ${variable#}
frans · 329 weeks and 2 days ago
A decent effort but its flawed as Franz pointed out above.. as well as his examples it also removes shebang lines. Removing comments at end of lines is a tricky problem no doubt.
zlemini · 328 weeks and 5 days ago
Sorry, But I did not understand the syntax of this command, but the line below is also an alternative to remove the comments "#" of the specified files. sed-i-r 's /^#// g' testes.txt The command you provided is just a filter on the file and print only after the same lines that do not have comments, or if the case of a configuration file, you can print only the rows that do not have the "#". I hope to have collaborated with everyone! Att, Julio C. S. Ferraz
julioferraz · 328 weeks and 4 days ago
frans: you're right, but I used this command to remove comments from a configuration file not a script file. To protect shebang you can use the following command: sed -e 's/^#!/__SHEBANG__/' -e '/^#/d' -e 's/#.*$//' -e 's/^__SHEBANG__/#!/' The shebang is first shebang '#!' replaced by __SHEBANG__ so the line won't be removed then comments are removed and at last __SHEBANG__ is replaced by the real shebang '#!'. I guess there's a another cleaner way to perform it. But it doesn't fix the case showed by frans.
agambier · 328 weeks and 4 days ago

What do you think?

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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