awk returns an integer? Post: 302290527

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awk or grep for integer only

how do you print the lines that contain integers only, using grep or awk? thanks , apalex ------------------ this file below: qwerty 01234 asdfgh 01234 qwer12 asdf05 will be: 01234 01234 qwer12 asdf05

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I'm on Linux version 2.6.32-696.3.1.el6.x86_64, using the Ksh shell. I'm working with the input file: John Daggett, 341 King Road, Plymouth MA Alice Ford, 22 East Broadway, Richmond VA Orville Thomas, 11345 Oak Bridge Road, Tulsa OK Terry Kalkas, 402 Lans Road, Beaver Falls PA Eric Adams,...

LEARN ABOUT SUSE

switch_root

SWITCH_ROOT(8)						      System Manager's Manual						    SWITCH_ROOT(8)

NAME

       switch_root - switch to another filesystem as the root of the mount tree.

SYNOPSIS

       switch_root [-hV]

       switch_root newroot init [arg...]

DESCRIPTION

       switch_root moves already mounted /proc, /dev and /sys to newroot and makes newroot the new root filesystem and starts init process.

       WARNING: switch_root removes recursively all files and directories on the current root filesystem.

OPTIONS

       -h, --help
	      show help and exit

       -V, --version
	      show version number and exit

RETURN VALUE

       switch_root returns 0 on success and 1 on failure.

NOTES

       switch_root  will  fail	to  function if newroot is not the root of a mount. If you want to switch root into a directory that does not meet
       this requirement then you can first use a bind-mounting trick to turn any directory into a mount point:

	      mount --bind $DIR $DIR

SEE ALSO

       mount(8) chroot(2) init(8) mkinitrd(8)

AUTHORS

       Peter Jones <pjones@redhat.com>
       Jeremy Katz <katzj@redhat.com>
       Karel Zak <kzak@redhat.com>

AVAILABILITY

       The switch_root command is part of the util-linux-ng package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux-ng/.

Linux								     June 2009							    SWITCH_ROOT(8)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

awk or grep for integer only

Discussion started by: apalex

2. Shell Programming and Scripting

counting non integer number in awk

Discussion started by: chaitubek

3. Shell Programming and Scripting

awk returns null?

Discussion started by: frenkelor

4. Emergency UNIX and Linux Support

Adding carriage returns to file using sed/awk

Discussion started by: bd_joy