WebNov 30, 2024 · Try the example below to see how multiline and block comments work in bash scripts: 1. Open the terminal ( CTRL + ALT + T) and create a shell script using Vi: … WebJul 5, 2024 · Comment Often with #s. If you start a line with a #, the line is ignored. This turns it into a comment line, where you can remind yourself of what the output of the previous command was, or what the next command will do. Again, turn off text wrapping, or break you comment into multiple lines that all begin with a hash.
How To Comment Out A Line In Linux – Systran Box
WebDec 3, 2024 · I need to comment out the lines xxx, yyy, zzz. So I run the following command: sed -e '/xxx/ s/^#*/#/' -i file sed -e '/yyy/ s/^#*/#/' -i file sed -e '/zzz/ s/^#*/#/' -i file out foo bar #xxx #yyy #zzz How can I do this in a loop (to check if all the lines that interest me, are or are not commented, and if they are not, comment them)? thanks WebSep 14, 2024 · One way is to use the # character at the beginning of each line you want to comment out. Another way is to use a multi- line comment block, which is enclosed by … scream mp3 sound effect
shell script to comment out or uncomment a line - testing
WebOct 27, 2024 · To comment in shell script, use the “#” symbol. Anything on a line after a “#” will be ignored by the shell. This is useful for adding notes or temporarily disabling certain lines of code. A comment is a human-readable explanation or annotation that can be written in the shell script. Webin the same manner as in vi ( sed always applies all commands to every line of the input stream, so we don't use anything like % or g explicitly with sed ). To remove the comment character for the line that starts with #HOST: sed 's/^#HOST/HOST/' input >output or sed '/^#HOST/s/.//' input >output WebJul 1, 2024 · The least surprising completely safe way to insert comments in shell scripts is with #. Stick to that even for multi-line comments. Never attempt to (ab)use : for comments. There is no dedicated multi-line comment mechanism in shell that is analogous to the slash-star /* */ form in C -like languages. scream movies cast 6