How to comment a line that starts with?
The replacement is the same as in the first command. in 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:
What does PE mean in a sed script?
The -pe means p rint every input line after applying the script given by -e. The s/foo/bar/ is the replacement operator and will replace the first instance of foo with bar on every line.
Do you need / G for regex SED commenting?
Assuming you don’t have any lines with multiple # s this would work: Note: you don’t need /g since you are doing at most one substitution per line. I find this solution to work the best.
When to use sed to comment all of BBB?
Comment all “BBB”, if it’s haven’t comment yet. I’d usually supply sed with -i.bak to backup the file prior to making changes to the original copy: This way when done, I have both file and file.bak and I can decide to delete file.bak only after I’m confident. Thanks for contributing an answer to Stack Overflow!
How do I use variables in a sed command?
We can use variables in sed using double quotes: If you have a slash / in the variable then use different separator, like below: Highly active question. Earn 10 reputation (not counting the association bonus) in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
How do you make a comment on a Word document?
To preserve the layout of your document, comments are displayed in balloons that appear in the margin. Select the text or item that you want to comment on, or click to insert the cursor near the text that you want to comment on. On the Review tab, under Comments, click New. Type the comment text in the comment balloon.
How to skip initial comment lines in Python?
How to skip initial comment lines using if statement A naive way to read a file and skip initial comment lines is to use “if” statement and check if each line starts with the comment character “#”. Python string has a nice method “startswith” to check if a string, in this case a line, starts with specific characters.
Where do comments start in a modern language?
If you look at modern languages where the comment can start at any place on the line and end at any place on the line, a good portion of that available 4K would have been necessary just for processing comments! End-of-Line Comments With assembly language we have two improvements in comments.