How do you delete a specific line in a file using sed?
To Remove the lines from the source file itself, use the -i option with sed command. If you dont wish to delete the lines from the original source file you can redirect the output of the sed command to another file.
How do I delete specific entries in history?
- To clear all your history, use history -c.
- To delete a single line, use history -d linenumber.
How do you delete multiple lines in Unix?
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 with multiple keywords in SED?
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.
Can a sed script save a file of line numbers?
Humorously (but perhaps slightly confusingly) you can do this with sed. This accepts a file of line numbers, one per line, and produces, on standard output, the same line numbers with d appended after each. This is a valid sed script, which we can save to a file, or (on some platforms) pipe to another sed instance:
How to delete lines that start with specified character?
Delete lines that begin with specified character ^ is to specify the starting of the line. Above sed command removes all the lines that start with character ‘u’. 11. Delete lines that end with specified character $ is to indicate the end of the line. The above command deletes all the lines that end with character ‘x’. 12.
How to remove rows from a text file?
Futhermore, we can also remove multiple rows from this file. For example let’s remove all rows from 2 to 4: We can also remove all lines matching a certain regular expression. In the next example we are going to remove line which contains at least one C character: To save the change into a existing file use -i option.