WebFeb 2, 2024 · The command below will show the matching lines along with the 5 lines after the match. grep -A 5 search_pattern filename. Similarly, you can use the -B option to show lines before the matching ones. Remember, B is for Before. The command below will show 5 lines before the matching ones along with the matching line (s). WebMar 31, 2024 · It works well and now I am incorporating a test to make sure fail2ban is installed via 'grep' and 'systemctl status'. My (failing) current attempts to detect non-installed fail2ban with a 'known result', (and multiple permutations thereof) is: ... my bash skills aren't the 'best' as I get "grep: invalid option -- 'p'", and 'too many arguments ...
Source RVM script - "grep: invalid option --
WebJul 15, 2024 · Which resulted in the following error: xargs: invalid option -- 'o' I was able to execute the command correctly on my Mac Mojave, but not on Ubuntu 16.04. According to the xargs website, there should have been a -o option: --open-tty -o Web5. The problem is that there is a file in that directory that begins with a dash, namely -.slice. When you use * all the file names become arguments to the grep, and -.slice gets interpreted as an attempt to pass an option to grep. Since the first character after the dash is a dot, you get that message: grep: invalid option -- '.'. dogfish tackle \u0026 marine
Is GNU grep
WebFeb 2, 2024 · There is no specific option for the AND operator. You may use grep multiple times with pipe redirection for that. Search binary files. Grep ignores binary files by … WebOct 12, 2016 · GNU grep knows about -q, but pgrep (process grep, part of procps) doesn't. This is annoying enough that I've had to replace /usr/bin/pgrep with a wrapper that detects that the first argument is -q , does exec >/dev/null 2>&1 , shifts off the first argument, and then execs the original pgrep. WebUnless the -E or -F option is also specified, each pattern shall be treated as a BRE, as described in the Base Definitions volume of POSIX.1‐2024, Section 9.3, Basic Regular Expressions. Multiple -e and -f options shall be accepted by the grep utility. All of the specified patterns shall be used when matching lines, but the order of ... dog face on pajama bottoms