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Top Forums Shell Programming and Scripting Is there anyway to grep any special characters from a file ? Post 302593508 by poga on Friday 27th of January 2012 05:58:22 AM
Old 01-27-2012
Data Is there anyway to grep any special characters from a file ?

Is there any command or shell script to grep any special character from a file ? I have a huge file containing millions of user names; the requirement is to find names containing special characters.

Code:
#!/bin/bash
for i in `cat username.txt`
do
#COMMAND to grep special character
done

Thanks in advance.
Poga
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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