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Full Discussion: Managing awk return code over SSH command
Top Forums Shell Programming and Scripting Managing awk return code over SSH command Post 302557197 by Corona688 on Tuesday 20th of September 2011 02:54:58 PM
Old 09-20-2011
Do you really need root to read /etc/redhat-release?? This seems dangerous.

You can use and check the return code instead of backticking text:
Code:
if ssh -l username host awk "' \$7 == \"6.1\" { exit 0 } END { exit 1 }'" /etc/redhat-release
then
        echo "Found version 6.1"
else
        echo "Not version 6.1"
fi

 

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LEARN ABOUT POSIX

switch_root

SWITCH_ROOT(8)						       System Administration						    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, /sys and /run 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
	      Display help text and exit.

       -V, --version
	      Display version information 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

       chroot(2), init(8), mkinitrd(8), mount(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 package and is available from https://www.kernel.org/pub/linux/utils/util-linux/.

util-linux							     June 2009							    SWITCH_ROOT(8)
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