05-01-2001
egrep -e PATTERN logfile > file
Where PATTERN is a regular expression that extracts the lines you want; logfile is the logfile, of course; and file is the same of the particular file for the user in the pattern.
All you have to do now is get a book on regular expresions and work on the syntax
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EID(1) User Commands EID(1)
NAME
eid - Query ID database and report results.
SYNOPSIS
eid [OPTION]... PATTERN...
DESCRIPTION
Query ID database and report results. By default, output consists of multiple lines, each line containing the matched identifier followed
by the list of file names in which it occurs.
-f, --file=FILE
file name of ID database
-i, --ignore-case
match PATTERN case insensitively
-l, --literal
match PATTERN as a literal string
-r, --regexp
match PATTERN as a regular expression
-w, --word
match PATTERN as a delimited word
-s, --substring
match PATTERN as a substring
Note: If PATTERN contains extended regular expression metacharacters, it is interpreted as a regular expression substring. Other-
wise, PATTERN is interpreted as a literal word.
-k, --key=STYLE
STYLE is one of `token', `pattern' or `none'
-R, --result=STYLE
STYLE is one of `filenames', `grep', `edit' or `none'
-S, --separator=STYLE
STYLE is one of `braces', `space' or `newline' and only applies to file names when `--result=filenames'
The above STYLE options control how query results are presented. Defaults are --key=token --result=filenames --separator=space
-F, --frequency=FREQ
find tokens that occur FREQ times, where FREQ is a range expressed as `N..M'. If N is omitted, it defaults to 1, if M is omitted it
defaults to MAX_USHRT
-a, --ambiguous=LEN
find tokens whose names are ambiguous for LEN chars
-x, --hex
only find numbers expressed as hexadecimal
-d, --decimal
only find numbers expressed as decimal
-o, --octal
only find numbers expressed as octal
By default, searches match numbers of any radix.
--help display this help and exit
--version
output version information and exit
REPORTING BUGS
Report bugs to bug-idutils@gnu.org
SEE ALSO
The full documentation for eid is maintained as a Texinfo manual. If the info and eid programs are properly installed at your site, the
command
info eid
should give you access to the complete manual.
eid - 4.5 August 2010 EID(1)