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I saw the sed examples, but no matter how I write that it won't delete my first line. Actually, I did more tests and it won't delete my first line either, so for sure I'm doing something wrong:
sed '1d' filename
or for last line
sed '$d' file name
I want the changes to take place in the same file, and don't want another output file. So please, what's the correct way to remove the last line in my file?
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:g/^#/d - Remove all comments from a Bash script. The pattern ^# means each line beginning with # . :g/^$/d - Remove all blank lines. The pattern ^$ matches all empty lines.
txt (if it ends with EOF , or \n and then EOF ), the number of lines in new_file. txt may be the same (as file. txt ) after this command (this happens when there is no \n ) - in any case, the contents of the last line is deleted.
Using the tail Command Usually, we use the “tail -n x file” command to get the last x lines from an input file. If we prepend a “+” sign to the “x“, the “tail -n +x file” command will print starting with the xth line until the end of the file.
To delete a line, we'll use the sed “d” command. Note that you have to declare which line to delete. Otherwise, sed will delete all the lines.
sed -i '$ d' filename. The -i flag edits file in place.
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