I have a shell script whose output I want to redict to a log file. So, I can simply redirect the output as shown below.
But, this script is not going to be executed manually or through cron job. Instead, it is invoked by Symantec Netbackup program remotely.
So, I don't get a chance to redirect the output to a log file as shown above.
So, I need to have some mechanism within the script itself to redirect the output to a file. Any idea how I can do this ?
Hi,
I am writing a shell script (ksh, solaris 5.8).
Script is X.sh
variables declared:
LOGFILE=X.log
the script is removing a file:
/usr/bin/rm "$DUMP_FILE1".Z >> $LOGFILE
If I kick off the script from the command line as follows:
./X.sh > X.con 2<& 1 (1 Reply)
Hi all,
I wish to have a script running even if my session is disconnected.
I've tried calling another session within it and using sudo to a different user, but it didn't work - as it was expected to do so :rolleyes:
I guess I'll have to work with "nohup" command, right ?
trying with the... (4 Replies)
Hi ALL,
Is there any way, to login into a website using Shell/Perl command/script?
I am struggling on this from quite sometime but with no luck. Can you guys help, please?
My sole purpose is to login a website (Which requires Username and Password) and then extract some information from... (3 Replies)
Dear all,
good day.
i'm asking about how to disable <control>-c or <control>-z in the beginning of a shell script then enable it again before the script exit
Best Regards
---------- Post updated at 04:41 AM ---------- Previous update was at 04:18 AM ----------
Dear All
i found the... (3 Replies)
hi all,
i want to log every thing happen in my server
is any body can provide me with articals, pdf's
is that correct to log every thing in the system
what is the most important thing i should i log it (4 Replies)
Hi All,
I am preparing a script which executes following things:
1) Logs into 8 cluster one by one.
2) After logging into each cluster,it prints the cluster name & then exit from that cluster.
3) Then it logs to next cluster & peform the same task.
Here is what i have written :
for... (8 Replies)
Hi,
my question is probably quite easy. On one linux machine I have messages being constantly being written to /var/log/messages. An ntpd message comes in every few seconds. I can see new ones with tail messages. On the other machine there seems to be no messages arriving in /var/log/messages.... (3 Replies)
How could I enable logging of bind 9 forwarders messages? I have the following but forwarded requests do not show up in the logs even when running named in debug 10 mode:
logging {
channel syslog_errors { // this channel will send errors or
... (0 Replies)
I have a bash shell script, within it i am using the below two commands . its failing right on scl enable command itself.
if i run it by itself without a shell, it works fine.
by default it is using pythin version 2.6 something. i want to use 3.4 version for that reason with in the shell... (3 Replies)
Discussion started by: cplusplus1
3 Replies
LEARN ABOUT LINUX
unbuffer
UNBUFFER(1) General Commands Manual UNBUFFER(1)NAME
unbuffer - unbuffer output
SYNOPSIS
unbuffer program [ args ]
INTRODUCTION
unbuffer disables the output buffering that occurs when program output is redirected from non-interactive programs. For example, suppose
you are watching the output from a fifo by running it through od and then more.
od -c /tmp/fifo | more
You will not see anything until a full page of output has been produced.
You can disable this automatic buffering as follows:
unbuffer od -c /tmp/fifo | more
Normally, unbuffer does not read from stdin. This simplifies use of unbuffer in some situations. To use unbuffer in a pipeline, use the
-p flag. Example:
process1 | unbuffer -p process2 | process3
CAVEATS
unbuffer -p may appear to work incorrectly if a process feeding input to unbuffer exits. Consider:
process1 | unbuffer -p process2 | process3
If process1 exits, process2 may not yet have finished. It is impossible for unbuffer to know long to wait for process2 and process2 may
not ever finish, for example, if it is a filter. For expediency, unbuffer simply exits when it encounters an EOF from either its input or
process2.
In order to have a version of unbuffer that worked in all situations, an oracle would be necessary. If you want an application-specific
solution, workarounds or hand-coded Expect may be more suitable. For example, the following example shows how to allow grep to finish pro-
cessing when the cat before it finishes first. Using cat to feed grep would never require unbuffer in real life. It is merely a place-
holder for some imaginary process that may or may not finish. Similarly, the final cat at the end of the pipeline is also a placeholder
for another process.
$ cat /tmp/abcdef.log | grep abc | cat
abcdef
xxxabc defxxx
$ cat /tmp/abcdef.log | unbuffer grep abc | cat
$ (cat /tmp/abcdef.log ; sleep 1) | unbuffer grep abc | cat
abcdef
xxxabc defxxx
$
BUGS
The man page is longer than the program.
SEE ALSO
"Exploring Expect: A Tcl-Based Toolkit for Automating Interactive Programs" by Don Libes, O'Reilly and Associates, January 1995.
AUTHOR
Don Libes, National Institute of Standards and Technology
1 June 1994 UNBUFFER(1)