How to delete lines from a file until a specific pattern?
I need to look up the line number of a specific match in a file – email address – and then delete it from the beginning of the file until the matched line. e.g Let’s say the line number is 13807. So I need to keep the 13808 + lines intact.
Is there a way to remove lines from a source file?
However the sed command does not remove the lines from the source file. 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 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 lines from a Unix file?
Note: In all the above examples, the sed command prints the contents of the file on the unix or linux terminal by removing the lines. However the sed command does not remove the lines from the source file. To Remove the lines from the source file itself, use the -i option with sed command. > sed -i ‘1d’ file
How to keep a line with a specific pattern?
Input is read from input_file and appended to output_file. If you want to keep the line with the pattern, reverse the two parts of the awk script. Try this shell script. It take 2 argument as input. First argument is the input filename. And the second argument is the required pattern to search.
How to stop AWK from printing a specific line?
For example, to act on all the non-hidden files in the current directory you could use: While the variable stop is 0 (which is is, by default), awk will print the current line. However, if the current line matches the regular expression /specific-pattern/, then stop will be set to 1.