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Full Discussion: Cut out string in bash script
Top Forums Shell Programming and Scripting Cut out string in bash script Post 302397297 by alister on Sunday 21st of February 2010 06:27:44 PM
Old 02-21-2010
The following will extract the first component of the url and strip any trailing digits that may be present (leading or embedded numbers are left intact):

Code:
echo "$STRING" | awk -F'\\/\\/|\\.' '{sub(/[0-9]+$/, "", $2); print $2}'


@durden tyler
Quote:
Originally Posted by durden_tyler
Code:
$ 
$ STRING=http://name5.domain.com:8000/file.dat
$ 
$ echo $STRING | perl -lne '/http:\/\/(.*?)\d.*/ && print $1'
name
$ 
$

That perl will not work if the trailing digit is not present or if there's a digit embedded elsewhere in the name. The latter may be unlikely, but the original query states that the digit is not always present.

Cheers,
Alister
 

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LEARN ABOUT REDHAT

echo

ECHO(1) 								FSF								   ECHO(1)

NAME

       echo - display a line of text

SYNOPSIS

       echo [OPTION]... [STRING]...

DESCRIPTION

       NOTE:  your shell may have its own version of echo which will supercede the version described here. Please refer to your shell's documenta-
       tion for details about the options it supports.

       Echo the STRING(s) to standard output.

       -n     do not output the trailing newline

       -e     enable interpretation of the backslash-escaped characters listed below

       -E     disable interpretation of those sequences in STRINGs

       --help display this help and exit

       --version
	      output version information and exit

       Without -E, the following sequences are recognized and interpolated:

       NNN   the character whose ASCII code is NNN (octal)

       \     backslash

       a     alert (BEL)

            backspace

       c     suppress trailing newline

       f     form feed

       
     new line

       
     carriage return

       	     horizontal tab

       v     vertical tab

AUTHOR

       Written by FIXME unknown.

REPORTING BUGS

       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

SEE ALSO

       The  full documentation for echo is maintained as a Texinfo manual.  If the info and echo programs are properly installed at your site, the
       command

	      info echo

       should give you access to the complete manual.

GNU coreutils 4.5.3						   February 2003							   ECHO(1)
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