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UNIX for Dummies Questions & Answers
cat /dev/null
Post 302177154 by freakydancer on Thursday 20th of March 2008 07:52:05 AM
03-20-2008
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Maybe it's an stupid question but remeber... I'm Junior..
I use command line to run programs, and some of them gives a lot of information when, for example, you open a window or other actions. That's really bad because my terminal gets full of unwanted messages, so I use "bin file & >/dev/null"... (1 Reply)
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Hi ,
I am importing some table from /dev/null i dont understand what is /dev/null
Sorry i am new to UNIX
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Hi,
Q1-What does
nroff -ms > /dev/null
Q2- What does mean -A under STAT column :
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UTIL PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 516 93,0 0,0 12 12 - A 04 nov 3906:51 wait
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hello all,
In many shell scripts i found '> /dev/null' , i am not able to get this,
will any one please explain why we are using this.
thanks
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Hi, Anyone can help
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Hi expert,
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Hello,
I'm trying to send the error output of a 'cat' operation to /dev/null like this:
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How are these two different? They both prevent output and error from being displayed. I don't see the use of the "&"
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I apologize if this question has been answered else where or is too elementary.
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if ; then
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LEARN ABOUT CENTOS
nislog
nislog(1M) System Administration Commands nislog(1M) NAME
nislog - display the contents of the NIS+ transaction log SYNOPSIS
/usr/sbin/nislog [-h num | -t num] [-v] [directory...] DESCRIPTION
nislog displays the contents of the NIS+ server transaction log on the standard output. This command can be used to track changes in the namespace. The /var/nis/trans.log file contains the transaction log maintained by the NIS+ server. When updates occur, they are logged to this file and then propagated to replicas as log transactions. When the log is checkpointed, updates that have been propagated to the replicas are removed. The nislog command can only be run on an NIS+ server by superuser. It displays the log entries for that server only. If directory is not specified, the entire log is searched. Otherwise, only those logs entries that correspond to the specified directories are displayed. OPTIONS
-h num Display num transactions from the ``head'' of the log. If the numeric parameter is 0, only the log header is displayed. -t num Display num transactions from the ``tail'' of the log. If the numeric parameter is 0, only the log header is displayed. -v Verbose mode. FILES
/var/nis/trans.log transaction log ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWnisu | +-----------------------------+-----------------------------+ SEE ALSO
nis+(1), rpc.nisd(1M), nisfiles(4), attributes(5) NOTES
NIS+ might not be supported in future releases of the SolarisTM Operating Environment. Tools to aid the migration from NIS+ to LDAP are available in the Solaris 9 operating environment. For more information, visit http://www.sun.com/directory/nisplus/transition.html. SunOS 5.10 12 Dec 2001 nislog(1M)