How to delete line with matching pattern in unix?
To begin with, if you want to delete a line containing the keyword, you would run sed as shown below. Similarly, you could run the sed command with option -n and negated p , (! p) command. To delete lines containing multiple keywords, for example to delete lines with the keyword green or lines with keyword violet.
How to remove multiple lines from a file in unix?
To delete multiple lines at once, prepend the dd command with the number of lines to be deleted….Deleting Multiple Lines
- Press the Esc key to go to normal mode.
- Place the cursor on the first line you want to delete.
- Type 5dd and hit Enter to delete the next five lines.
How to delete lines that come after a specific line?
This means I need to keep the file from the head to the patten line which must be included. This is very trivial with text processing utilities. For example, using sed: Meaning, match every line from the first one to the one with pattern and delete all the non-matched lines. So, replace pattern with your pattern.
How to delete a line from a pattern match?
This combined with the line from the pattern match (/bar/) will be the lines that you wish to delete. You can then delete normally with the “d” command. If any line immediately following a match should be removed then your sed program will have to consider consecutive matches.
How to delete more than 2 lines in SED?
For example, if you have a 3-line file bar / bar / foo, the foo line will stay. which can be adapted to delete more than 2 lines by changing the 2 above with the number of lines to delete including the matching one. If not, it’s easily done in sed with @MichaelRollins’ solution or:
How to remove line containing certain string in Linux?
If you have GNU sed (so non-embedded Linux or Cygwin): If you have bar on two consecutive lines, this will delete the second line without analyzing it. For example, if you have a 3-line file bar/bar/foo, the foo line will stay. sed ‘/bar/d’ if you just want to “Remove line containing certain string” and not the next.