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Top Forums UNIX for Dummies Questions & Answers HELP | unix | regular expression - How to represent two whitespaces? Post 302361225 by MykC on Monday 12th of October 2009 04:31:34 PM
Old 10-12-2009
HELP | unix | regular expression - How to represent two whitespaces?

ls -l generates something like...

Code:
-rwxr-xr-x 1 root root   19304 Jan 21  2009 true
-rwsr-xr-x 1 root root   40208 Jan 21  2009 umount
-rwxr-xr-x 1 root root   22336 Jan 21  2009 uname
-rwxr-xr-x 1 root root    1273 Jan 21  2009 unicode_start
-rwxr-xr-x 1 root root      79 Jan 21  2009 unicode_stop
-rwxr-xr-x 1 root root   20576 Jan 21  2009 unlink
-rwxr-xr-x 1 root root   31280 Mar 11  2009 usleep
-rwxr-xr-x 1 root root  632816 Nov 25  2008 vi
lrwxrwxrwx 1 root root       2 Mar  4  2009 view -> vi
lrwxrwxrwx 1 root root       8 Mar  3  2009 ypdomainname -> hostname
-rwxr-xr-x 3 root root   62864 May 28  2008 zcat
-rwxr-xr-x 1 root root  594848 Jan  7  2007 zsh

I want to change each line so that each line has at most one whitespace between characters.

I think I can do this if I knew how to represent two whitespaces. It seems " " or ' ' has the same value as " " or ' '. The first set of quotes have one space and the second set of quotes has two spaces.

I want to be able to take any output that prints into columns and then use something like cut or grep to select futher manipulate the output to only the columns I want. Or something that would tokenize the string. I haven't used sed/awk, but I want to do it with grep, tr or cut preferably.
 

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GZEXE(1)						      General Commands Manual							  GZEXE(1)

NAME
gzexe - compress executable files in place SYNOPSIS
gzexe name ... DESCRIPTION
The gzexe utility allows you to compress executables in place and have them automatically uncompress and execute when you run them (at a penalty in performance). For example if you execute ``gzexe /usr/bin/gdb'' it will create the following two files: -rwxr-xr-x 1 root root 1026675 Jun 7 13:53 /usr/bin/gdb -rwxr-xr-x 1 root root 2304524 May 30 13:02 /usr/bin/gdb~ /usr/bin/gdb~ is the original file and /usr/bin/gdb is the self-uncompressing executable file. You can remove /usr/bin/gdb~ once you are sure that /usr/bin/gdb works properly. This utility is most useful on systems with very small disks. OPTIONS
-d Decompress the given executables instead of compressing them. SEE ALSO
gzip(1), znew(1), zmore(1), zcmp(1), zforce(1) CAVEATS
The compressed executable is a shell script. This may create some security holes. In particular, the compressed executable relies on the PATH environment variable to find gzip and some standard utilities (basename, chmod, ln, mkdir, mktemp, rm, sleep, and tail). BUGS
gzexe attempts to retain the original file attributes on the compressed executable, but you may have to fix them manually in some cases, using chmod or chown. GZEXE(1)
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