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Shell Programming and Scripting
/dev/null what is the use of it?
Post 302211323 by webmunkey23 on Thursday 3rd of July 2008 05:26:04 AM
07-03-2008
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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
sam71 (3 Replies)
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Hi,
Q1-What does
nroff -ms > /dev/null
Q2- What does mean -A under STAT column :
ps aux |head -20
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
My solaris 8 system has the following
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Hi expert,
May I know what is the difference between below cron tab entry ?
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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 "&"
echo "hello" > /dev/null 2>&1
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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:
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Hello All and a Happy New year to yous guys.
I'm running the below command on my AIX box and it keeps giving me the message that the file doesn't exist. I know the file don't exist, but I don't want to see the error. 2>/dev/null doesn't work.
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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
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LEARN ABOUT NETBSD
paths
PATHS(3) BSD Library Functions Manual PATHS(3) NAME
paths -- default system paths SYNOPSIS
#include <paths.h> DESCRIPTION
The <paths.h> header defines some default paths used in NetBSD. All defined constants are prefixed with _PATH. The constants include: o The default user search path set by login(1) and associated utilities such as rshd(8). This is defined by _PATH_DEFPATH and includes directories such as /usr/bin and /usr/local/bin. o Default paths for some utilities and device nodes. Examples include such paths as /dev/null (_PATH_DEVNULL), /dev/mem (_PATH_MEM), and /etc/nologin (_PATH_NOLOGIN), among others. o Paths for some default directories such as /dev (_PATH_DEV) and /tmp (_PATH_TMP) as well as paths for some miscellaneous utilities such as csh(1), /bin/csh (_PATH_CSHELL). SEE ALSO
whereis(1), sysexits(3), types(3), hier(7) CAVEATS
The <paths.h> header is specific to NetBSD. BSD
April 8, 2011 BSD