08-13-2010
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hi
I want to know how to save all the command used by all the used under a particular root with the time stamp in a file.
Eg:
User Name: UX10
Time: 10:56
Command: LS
User Name: UX23
Time: 10:59
Command: MORE abc.txt
Please do help.
thanks and regards
-Anand (1 Reply)
Discussion started by: anandtharani
1 Replies
2. Fedora
Hello sir,
Im in a Fedora 9 system.
Im using screen to invoke the session that is created by me.
Whenever we open the terminal then a session is created by the operating system. I want to know what is the name of default session in screen command.
I could not get it using "screen -ls". Can you... (3 Replies)
Discussion started by: nsharath
3 Replies
3. Shell Programming and Scripting
Hi all,
is it possible to save the output of a unix command executed in perl to be saved in hash variable..
like i have the command
`find $mypath ! -user mainuser -printf \"\%u \%h\\n\"`;
this will print all the users other than mainuser with their paths.
so is possible to capture... (2 Replies)
Discussion started by: saapa
2 Replies
4. UNIX for Dummies Questions & Answers
hi, everyone:
I just wonder how to save the output of command, I mean everything, save as a string into a variable.
another question is I try to ls the details of a directory, but it works in the shell, not in the script.
for example
code: ls -ltr *se100* | grep ^- | tail -1 | awk '... (1 Reply)
Discussion started by: allenxiao7
1 Replies
5. Shell Programming and Scripting
Dear All,
I am writing a script and kind of stuck in a small thing. Cannot figure it out. so please help
I am logged in as root user. I want to switch user to "user1" inside the script and execute a specific command lets say "pwd" and come back where i started.
I know how to switch user,... (16 Replies)
Discussion started by: suhail.sadaqat
16 Replies
6. Shell Programming and Scripting
Hi,
in shell script, i have the command swstart -p which returns an output. i want to store the output of this command into a variable. how i can do that
excerpt from the script
#!/usr/bin/ksh
#
#
#
# Program: swstart -p
#
# Description: Starts the sentinels on Slave server
... (4 Replies)
Discussion started by: lookinginfo
4 Replies
7. Red Hat
I have setup public key based login to my CentOS VPS. I wish to disable direct root login and have created an admin user under wheel group and have modified /etc/sudoers file and gave Wheel group all privileges.
But now I am being prompted for password whenever I type sudo. I do not wish to... (4 Replies)
Discussion started by: JoyceBabu
4 Replies
8. Shell Programming and Scripting
Hi
Can anyone suggest how i can save a command into a file.
i am trying to execute couple of put commands which i want to write into a file.
example below
put sample.dat abcd@server.com
put sample1.dat abcd@server.com
.
.
.
tried cat but no luck
Please suggest how i can do... (1 Reply)
Discussion started by: ramkiran77
1 Replies
9. Shell Programming and Scripting
Hi all,
I am new in linux script, and I have the code below
#!/bin/bash
CMD="shuf -i 1-5 -n 1"
$CMD
echo $CMD
exit 0
if I run the $CMD, it will return me a shuffle value. However, I need to save the return value of the shuffle, and use it later on. I tried for example print the... (3 Replies)
Discussion started by: peuceul
3 Replies
10. Shell Programming and Scripting
I am trying to modify the "corestat v1.1" code which is in Perl.The typical output of this code is below:
Core Utilization
CoreId %Usr %Sys %Total
------ ----- ----- ------
5 4.91 0.01 4.92
6 0.06 ... (0 Replies)
Discussion started by: Zam_1234
0 Replies
catch(n) Tcl Built-In Commands catch(n)
__________________________________________________________________________________________________________________________________________________
NAME
catch - Evaluate script and trap exceptional returns
SYNOPSIS
catch script ?varName?
_________________________________________________________________
DESCRIPTION
The catch command may be used to prevent errors from aborting command interpretation. Catch calls the Tcl interpreter recursively to exe-
cute script, and always returns without raising an error, regardless of any errors that might occur while executing script.
If script raises an error, catch will return a non-zero integer value corresponding to one of the exceptional return codes (see tcl.h for
the definitions of code values). If the varName argument is given, then the variable it names is set to the error message from interpret-
ing script.
If script does not raise an error, catch will return 0 (TCL_OK) and set the variable to the value returned from script.
Note that catch catches all exceptions, including those generated by break and continue as well as errors. The only errors that are not
caught are syntax errors found when the script is compiled. This is because the catch command only catches errors during runtime. When
the catch statement is compiled, the script is compiled as well and any syntax errors will generate a Tcl error.
EXAMPLES
The catch command may be used in an if to branch based on the success of a script.
if { [catch {open $someFile w} fid] } {
puts stderr "Could not open $someFile for writing
$fid"
exit 1
}
The catch command will not catch compiled syntax errors. The first time proc foo is called, the body will be compiled and a Tcl error will
be generated.
proc foo {} {
catch {expr {1 +- }}
}
KEYWORDS
catch, error
Tcl 8.0 catch(n)