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How do you comment a line in a shell script?
A single-line comment starts with hashtag symbol with no white spaces (#) and lasts till the end of the line. If the comment exceeds one line then put a hashtag on the next line and continue the comment. The shell script is commented out prefixing # character for single-line comment.
How do you comment out a line in Linux?
Whenever you want to comment a line, put a # in an appropriate place in a file. Anything beginning after # and ending at the end of the line won’t get executed. This comments out the complete line. This comments out only the last part of the line starting at #.
How do you comment out multiple lines in a shell script?
Commenting Multiple Lines
- First, press ESC.
- Go to the line from which you want to start commenting.
- use the down arrow to select multiple lines that you want to comment.
- Now, press SHIFT + I to enable insert mode.
- Press # and it will add a comment to the first line.
How do I comment out a line in a file?
The Short Answer. You can “uncomment a line” in a configuration file by removing the # at the start of the line. Or, to “comment out” a line, add a # character to the start of the line. (Note that some languages have different comment formats, so this may not be true if you’re working with a source code file.)
How to uncomment a line that contains a specific string using Bash?
Yes, to comment line containing specific string with sed, simply do: sed -i ‘/ /s/^/#/g’ file And to uncomment it: sed -i ‘/ /s/^#//g’ file
How to comment and uncomment a line in a file?
POSIX awk doesn’t offer in-place updating (neither does POSIX sed, incidentally), hence the output is first captured in a temporary file and that file then replaces the original on success. Quick example of how to comment and uncomment a line in a file. Thanks for contributing an answer to Stack Overflow!
How to add semicolons to a sed script?
The script is as follows: The first sed command adds a semicolon (;) to the lines containing the variable $match, if the line is already commented, it leaves it as is. The second one removes semicolons from the beginning of a line. Be careful because the ‘ -i ‘ sed option will directly modify the “configurationFileName.conf” file.
When to use a comma instead of a dash in SED?
This script is used the same as yours with the exception that the first and last lines are to be separated by a comma rather than a dash. For example: An uncomment command can be created analogously. sed ‘s line selection is quite powerful.