Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

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-Q[symspec], --no-graph[=symspec]

Don’t print call graph analysis.

-T, --traditional

Print output in BSD style.

-Z[symspec], --no-exec-counts[=symspec]

Don’t print statistics on the number of times each function is

called.

grep

grep [options] pattern [files]

Search one or more files for lines that match a regular expression

pattern. Regular expressions are described in Chapter 7. Exit status

is 0 if any lines match, 1 if none match, and 2 for errors. See also

egrep and fgrep.

Options

-a, --text

Don’t suppress output lines with binary data; treat as text.

-b, --byte-offset

Print the byte offset within the input file before each line of

output.

-c, --count

Print only a count of matched lines. With -v or --revert-match

option, count nonmatching lines.

-d action, --directories=action

Define an action for processing directories. Possible actions

are:

read

Read directories like ordinary files (default).

skip

Skip directories.

recurse

Recursively read all files under each directory. Same as -r.

-e pattern, --regexp=pattern

Search for pattern. Same as specifying a pattern as an argu-

ment, but useful in protecting patterns beginning with -.

-f file, --file=file

Take a list of patterns from file, one per line.

-h, --no-filename

Print matched lines but not filenames (inverse of -l).

-i ...