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Full Discussion: Grep with Regex multiple characters
Top Forums Shell Programming and Scripting Grep with Regex multiple characters Post 302971125 by Scrutinizer on Saturday 16th of April 2016 12:03:13 AM
Old 04-16-2016
Whether your grep supports \b depends on your implementation. GNU grep can, but regular grep probably not.
  • \b will only work here if the character that follows is a non-word character (so if it is number or an underscore then \b will not work)..
  • Also [a-zA-Z] is unreliable in some locale and it does not work for diacritical characters, so it is better to use the Posix [[:alpha:]] character class instead...
  • egrep (or grep -E as is preferred nowadays) can also use iteration but you need to leave out the escapes (\) before the curly braces

So combining these remarks, try:
Code:
grep -E '^V[[:alpha:]]{9}([^[:alpha:]]|$)' file


--
grep -E is the same as grep for a POSIX compliant grep.
Last edited by Scrutinizer; 04-16-2016 at 01:31 AM..
 

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LEARN ABOUT HPUX

zgrep

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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