outlet - an opening that permits escape or release; he blocked the way out; the canyon had only one issue. exit, way out, issue. opening - a vacant or unobstructed space that is man-made; they left a small opening for the cat at the bottom of the door.
Differences between grep, pgrep, egrep, and fgrep (Linux): grep grep is an acronym that stands for Global Regular Expressions Print. grep is a program which scans a specified file or files line by line, returning lines that contain a pattern. A pattern is an expression that specifies a set of strings by interpreting characters as meta-characters.
(3) Add line numbers to search results. The -n option adds line numbers to the output: $ grep-n unix examplefile.txt 2:this is line 2 unix This makes it easier to locate the pattern in a large file that doesn't have its own line numbers. (4) Display how many lines contain the search pattern.Another option instructs grep to count the number of times a pattern appears. grep-n unix examplefile.txt 2:this is line 2 unix This makes it easier to locate the pattern in a large file that doesn't have its own line numbers. (4) Display how many lines contain the search pattern.