09-09-2009
Does your OS have the equivalent of truss on Solaris. When a program is run with truss system calls are output to STDERR. If you have something like that running tar with that and then redirecting the output to /dev/null and a regular file might show you why it ends so soon.
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1. UNIX for Dummies Questions & Answers
Hi ,
I am importing some table from /dev/null i dont understand what is /dev/null
Sorry i am new to UNIX
sam71 (3 Replies)
Discussion started by: sam71
3 Replies
2. Solaris
Please help urgently.
I need to setup up some sort of service on a solaris server on a port.
I dont need it do anything special, anything that is sent to this port from an external server should be dump to /dev/null or a flat file..
Can you help urgently? (1 Reply)
Discussion started by: frustrated1
1 Replies
3. Solaris
Hi, Anyone can help
My solaris 8 system has the following
/dev/null , /dev/tty and /dev/console
All permission are lrwxrwxrwx
Can this be change to a non-world write ??
any impact ?? (12 Replies)
Discussion started by: civic2005
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4. Shell Programming and Scripting
when do you use the path /dev/null (3 Replies)
Discussion started by: webmunkey23
3 Replies
5. UNIX for Dummies Questions & Answers
Hello,
I am working on a script to measure the read performance of a busybox environment. The logical choice is to use a command line like:
(time cp * /dev/null) 2> /tmp/howlong.txt
Ah, the rub is cp or /dev/null will only accept a single file at a time.
The result in the txt file is and... (1 Reply)
Discussion started by: stevesmo
1 Replies
6. Shell Programming and Scripting
Hello,
I'm trying to send the error output of a 'cat' operation to /dev/null like this:
cat /dirA/dirB/temp*.log > /dirA/dirB/final.log 2>/dev/null
This works perfectly in a terminal, but not when placed in a script.
If there are no files matching temp*.log the script outputs an error... (7 Replies)
Discussion started by: Nils88
7 Replies
7. UNIX for Dummies Questions & Answers
How are these two different? They both prevent output and error from being displayed. I don't see the use of the "&"
echo "hello" > /dev/null 2>&1
echo "hello" > /dev/null 2>1 (3 Replies)
Discussion started by: glev2005
3 Replies
8. Shell Programming and Scripting
I apologize if this question has been answered else where or is too elementary.
I ran across a KSH script (long unimportant story) that does this:
if ; then
CAS_SRC_LOG="/var/log/cas_src.log 2>&1"
else
CAS_SRC_LOG="/dev/null 2>&1"
fithen does this:
/usr/bin/echo "heartbeat:... (5 Replies)
Discussion started by: jbmorrisonjr
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9. Shell Programming and Scripting
I'm using an text-to-speech synthesis in a script, and I need to redirect it's output to /dev/null
how can I do that ? And how to redirect the stream to his normal output then (sound card ) ?
thankx (2 Replies)
Discussion started by: firelink
2 Replies
10. Shell Programming and Scripting
Friends have the following problem
a search may not find anything which would correct example:
ls -ltr *prueba.txt | nawk '{ print $9 }' > Procesar.dat 2>/dev/null
When he finds nothing gives me the following error
ls: prueba.txt: No such file or directory
because 2> / dev / null... (4 Replies)
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LEARN ABOUT SUSE
virt-tar-out
virt-tar-out(1) Virtualization Support virt-tar-out(1)
NAME
virt-tar-out - Pack a virtual machine disk image directory into a tarball.
SYNOPSIS
virt-tar-out -a disk.img /dir files.tar
virt-tar-out -d domain /dir files.tar
virt-tar-out -d domain /dir - | gzip --best > files.tar.gz
DESCRIPTION
"virt-tar-out" packs a virtual machine disk image directory into a tarball.
The first parameter is the absolute path of the virtual machine directory. The second parameter is the tar file to write. Use "-" to
write to standard output.
EXAMPLES
Download the home directories from a guest:
virt-tar-out -d MyGuest /home - | gzip --best > homes.tar.gz
JUST A SHELL SCRIPT WRAPPER AROUND GUESTFISH
This command is just a simple shell script wrapper around the guestfish(1) "tar-out" command. For anything more complex than a trivial
copy, you are probably better off using guestfish directly.
OPTIONS
Since the shell script just passes options straight to guestfish, read guestfish(1) to see the full list of options.
SEE ALSO
guestfish(1), virt-cat(1), virt-copy-in(1), virt-copy-out(1), virt-edit(1), virt-tar-in(1), <http://libguestfs.org/>.
AUTHORS
Richard W.M. Jones ("rjones at redhat dot com")
COPYRIGHT
Copyright (C) 2011 Red Hat Inc. <http://libguestfs.org/>
This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
libguestfs-1.18.1 2013-12-07 virt-tar-out(1)