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Quite certainly I miss something basic. My file contains lines like
fooLOCATION=sdfmsvdnv
fooLOCATION=
barLOCATION=sadssf
barLOCATION=
and I want to delete all lines ending with LOCATION=.
sed -i '/LOCATION=$/d' file
does not do, it deletes nothing, and I have tried endless variations, but I don't get it. What inline sed command can do this?
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To delete a line in Vi or Vim, switch to normal mode first. If you're into command mode or insert mode, you can switch back to normal mode by pressing Escape. Highlight the line that you want to delete, then hit dd or D on the keyboard. The editor will automatically remove the whole line from the file.
Sed Command to Delete Lines – Based on Pattern Match. In the following examples, the sed command deletes the lines in file which match the given pattern. ^ is to specify the starting of the line. Above sed command removes all the lines that start with character 'u'.
There are two approaches here, either print all non-matching lines with
sed -in '/LOCATION=$/!p' file
or delete all matching names with
sed -i '/LOCATION=$/d' file
The first uses the n command line option to suppress the default action of printing the line. We then test for lines that end in LOCATION= and invert the pattern (only keeping those that don't match). When we get a desirable line, we print it with the p option.
The second looks for lines matching the end of line pattern, and deletes those that do.
Your file contains blank lines, and both of these keep those. If we don't want to keep those, we can change the first option to
sed -in '/^$/!{/LOCATION=$/!p}' file
which first checks if a line is not empty, and only bothers checking if it should be printed if it isn't empty. We can modify the second option to
sed -i '/^$/d;/LOCATION=$/d' file
which deletes blank lines and then checks about deleting the other pattern.
We can modify the options to work with different line ending by specifying the difference in the pattern. The difference between line endings on Unix/Linux (\n) and Windows (\r\n) is the presence of an extra carriage return on Windows. Modifying the four commands above to accept either, we get
sed -in '/LOCATION=\r\{0,1\}$/!p' filesed -i '/LOCATION=\r\{0,1\}$/d' filesed -in '/^\r\{0,1\}$/!{/LOCATION=\r\{0,1\}$/!p}' filesed -i '/^\r\{0,1\}$/d;/LOCATION=\r\{0,1\}$/d' fileNote that in each of these we allow an optional \r before the end of line. We use the curly bracket notation, as sed does not support the question mark optional quantifier in normal mode (using the r option to GNU sed for enabling extended regular expressions, we can replace \{0,1\} with ?).
On a Windows shell, all of the options above require double quotes instead of single quotes.
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