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Top Forums Shell Programming and Scripting Matching multiples of a single character using sed and awk Post 302231491 by joeyg on Tuesday 2nd of September 2008 12:05:27 PM
Old 09-02-2008
Hammer & Screwdriver A few slightly different variant solutions

Code:
> cat infile | grep "^[a-zA-Z]"
a123456
bbr22135
yet223

> cat infile | grep "^[a-zA-Z][0-9][0-9][0-9][0-9][0-9][0-9]"
a123456
> cat infile | grep "^[a-zA-Z][0-9]\{6\}"
a123456
> grep "^[a-zA-Z][0-9]\{6\}" <infile
a123456

 

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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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