Trace: • rabbitmq • apache_error_documents • perl • centos_apache_optimization • apache_mod_rewrite • routine_server_maintenance • diff • php_configuration • netbsd_pkg_add • grep

grep

  • -x - Select only those matches that exactly match the whole line.
Check if a line exists

Returns 0 or 1 exit codes 

cat filelist | grep -xq string
Return line number
cat filelist -n string