![]() ![]() Practically all of the lines within the log file will contain spaces, but we’re going to search for lines that have a space as their first character: grep "^ " geek-1.log The “^” regular expression operator matches the start of a line. We can force grep to only display matches that are either at the start or the end of a line. The -L (files without match) option does just that. ![]() The file names are listed, not the matching lines.Īnd of course, we can look for files that don’t contain the search term. To find out which C source code files contain references to the sl.h header file, use this command: grep -l "sl.h" *.c To see the names of the files that contain the search term, use the -l (files with match) option. grep -B 3 -x "20-Jan-06 15:24:35" geek-1.logĪnd to include lines from before and after the matching line use the -C (context) option. To see some lines from before the matching line, use the -B (context before) option. ![]()
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