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.
If no nameserver entries are present, the default is to use the name server on the local machine. The grep command can be used as follows: $ grep --color nameserver /etc/resolv.conf. Sample outputs: Fig.01: Linux / Unix: Find Preferred Dns Server Command. 1  Edit DNS Configuration Files.2  Ubuntu Linux Configure DNS Name Server IP Address (DNSâ¦. 3  How To Find Out What My DNS Servers Address Is. 4  How To Look Up DNS on a Linux and Unix Systems. grep --color nameserver /etc/resolv.conf. Sample outputs: Fig.01: Linux / Unix: Find Preferred Dns Server Command. 1  Edit DNS Configuration Files. 2  Ubuntu Linux Configure DNS Name Server IP Address (DNSâ¦. 3  How To Find Out What My DNS Servers Address Is.