egrep: Linux Commands HowTo

egrep: Search file(s) for lines that match an extended expression

Search file(s) for lines that match an extended expression (extended grep)
Syntax
egrep [ options ] ?PATTERN? files ...

egrep is the same as `grep -E?

all other options are the same as grep

The PATTERN is a regexp. In typical usage, the regexp is quoted to
prevent the shell from expanding any of the special characters as file
name wildcards. Normally, `egrep? prints the lines that matched. If
multiple file names are provided on the command line, each output line
is preceded by the name of the file and a colon.

OPTIONS

`-c?
Print out a count of the lines that matched the pattern, instead
of the lines themselves.

`-s?
Be silent. No output is produced, and the exit value indicates
whether or not the pattern was matched.

`-v?
Invert the sense of the test. `egrep? prints the lines that do
*not* match the pattern, and exits successfully if the pattern was
not matched.

`-i?
Ignore case distinctions in both the pattern and the input data.

`-l?
Only print the names of the files that matched, not the lines that
matched.

`-e PATTERN?
Use PATTERN as the regexp to match. The purpose of the `-e?
option is to allow patterns that start with a `-?.
"I?ve never had a humble opinion in my life. If you?re going to have one, why bother to be humble about it" - Joan Baez

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egrep,Linux,Commands,HowTo

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