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
Thank you. (4 Replies)
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)
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
sudha (2 Replies)
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)
I stumbled across a somewhat strange behavior of tar and find no explanation for it: i was testing a DVD for read errors and thought to simply tar the content and direct the output to /dev/null:
tar -cvf - /my/mountpoint/*ts > /dev/null
This way i expected the system to read the complete... (4 Replies)
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)
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)
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)
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)
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.
bash-3.00$ ls -l C* | wc -l 2>/dev/null
ls:... (2 Replies)
Discussion started by: bbbngowc
2 Replies
LEARN ABOUT DEBIAN
since
SINCE(1) User Manuals SINCE(1)NAME
since - display content of a file since the last time
SYNOPSIS
since [-aefhlmnqvxz] [-d seconds] [-s file] files
DESCRIPTION
since is a utility designed to monitor log files. since is similar to tail(2) as it also displays information appended to a file. However
since only displays the data which has been added since the last time since was run. If since is run on a particular file for the first
time, then the entire file is displayed.
EXAMPLE
since /var/log/apache/{access,error}_log > /dev/null
lynx --dump http://localhost/ > /dev/null
since /var/log/apache/{access,error}_log
OPTIONS -a Make updates to the since state files atomic. This option configures since to use a temporary file and a rename(2) instead of updat-
ing the state file in situ.
-d seconds
Specify the number of integer seconds to wait between polling files for changes. This option is only relevant in conjunction with
the -f option and if the inotify mechanism is not being used.
-e Print the header lines to standard error instead of standard output.
-f Follow the specified files. This option is analogous to tail -f as the files are also polled for changes until the process is inter-
rupted.
-h Print a terse help message.
-l Relaxed mode. If some data files are inaccessible since will not fail completely.
-m Disable mmap(2), use read(2) instead to access state and data files. Note that for certain smaller io operations read(2) may be
used even if this option has not been given.
-n Do not update the .since file which keeps track of file growth.
-q Make the utility operate more quietly.
-s filename
Specify the state file explicitly. Using this option will also disable the use of fallback state files.
-v Increase the verbosity. This option can be given multiple times.
-x Ignore file arguments which have compressed extensions.
-z Discard output. Similar to redirecting the output to /dev/null, but faster. If used in conjunction with the -f option, only the ini-
tial output will be discarded.
FILES
.since
State file recording the length of the previously displayed files. The location of the file can be set on the command line using
the -s option. If this option is not given, since will check the SINCE environment variable for the location of the state file. If
the SINCE environment variable has not been set since will use the HOME environment variable and store the information in the file
$HOME/.since. If the HOME variable is not set, since will use a getpwuid(3) lookup. If all these fail will use the file /tmp/since.
BUGS
since uses the inode of a file as its key, if that inode is recycled since will get confused. since is not particularly efficient when
storing or looking up the stat(2) information. Functionality equivalent to since can probably be achieved with a number of trivial shell
scripts.
COPYING
since may only be used, distributed and modified in accordance with the terms of the GPL (GNU General Public License) version 3 or newer as
published by the FSF (Free Software Foundation).
SEE ALSO tail(1), stat(2).
Linux JULY 1998 SINCE(1)