10 More Discussions You Might Find Interesting
1. UNIX for Beginners Questions & Answers
Hi,
I am attempting to assign the output of the following command, to two bash variables, var1 and var2 using "read," but it doesn't seem to be working.
# openstack hypervisor stats show | awk -F'|' 'NR==14{print $2,$3}'
vcpus 92
# echo $?
0
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Discussion started by: sand1234
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2. UNIX for Beginners Questions & Answers
Hi,
I have a script below that is running ssh <host> <command> on some servers.
Below is more or less the script. I have to modify it somehow to get rid of the 'confidential' hostnames
check_log.bash
#!/bin/bash
#
myPID=$$
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{
sub="parse_log"
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3. Shell Programming and Scripting
while read -a line; this is not working in ksh. what is the equivalent of this in ksh.
read: -a: unknown option (2 Replies)
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4. Shell Programming and Scripting
I'm looking for some help in figuring why my little bit of code will not process any entries other then the first one in my list.
while read line ;do
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a=`ssh user@$hostname uptime;echo $?`
if ];then
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5. Shell Programming and Scripting
hello guys,
i am having the below piece of code
error
()
{
echo"Press y /n"
read ans
case $ans in
y) main;;
n) exit
esac
}
In the abve code, read statement is not working i.e not waiting for user to enter input.
,i tested exit status its 1.
could anyone help me to do this
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6. Shell Programming and Scripting
I was trying to write a simple script which will read a text file and count the number of vowels in the file. My code is given below -
#!/bin/bash
file=$1
v=0
if
then
echo "$0 filename"
exit 1
fi
if
then
echo "$file not a file"
exit 2
fi
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7. Shell Programming and Scripting
Hello,
I have this file that sometime contains 0 lines and sometimes 1 or more.
It's supposed to then put the result (could be 0 or 1 or 2 or more) into a variable.
Then it's supposed to echo using an if else statement depending on the value of the variable.
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8. Shell Programming and Scripting
Hi,
I am trying to read a file line by line inside of a while loop. This while loop is part of a here document.
while read line
do
ssh -t $2@$remotehost <<REMOTE
ls path/to/dir > $path_to_dir
while read line1
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9. Shell Programming and Scripting
I have a script consisting of certain functions whose input is a file at same location. In that file i have written the name of anothe file at same location. The third file contains a word which act as a function in the first script.Let me give an example
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10. Shell Programming and Scripting
Pls this is emergency.I have written a script which is taking input from another script. and the contents of my second script are acting as functions to my main script.Now the problem is that in one of the functions i want the script ececution to stop and start when user enters any character r... (2 Replies)
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SYSLOGOUT(8) System Manager's Manual SYSLOGOUT(8)
NAME
syslogout - modular centralized shell logout mechanism
DESCRIPTION
syslogout is a generic approach to enable centralized shell logout actions for all users of a given system in a modular and centralized way
mostly aimed at avoiding work for lazy sysadmins. It has only been tested to work with the bash shell.
It basically consists of the small /etc/syslogout shell script which invokes other small shell scripts having a .bash suffix which are con-
tained in the /etc/syslogout.d/ directory. The system administrator can drop in any script he wants without any naming convention other
than that the scripts need to have a .bash suffix to enable automagic sourcing by the /etc/syslogout script.
For shell sessions, the contents of /etc/syslogout.d/" will be sourced by every user at logout if the following lines are present in his
$HOME/.bash_logout:
if [ -f /etc/syslogout ]; then
. /etc/syslogout
fi
If used for X sessions it is advisable to include the former statement into the Xreset script of the X display manager instead to prevent
that closing of an terminal emulator window yields unexpected results in your running X session if your X11 terminal emulator is using a
login shell. Be sure then to run it under the user-id of the X session's user. See the example files in /usr/share/doc/syslogout/ for
illustration.
Users not wanting /etc/syslogout to be sourced for their environment can easily disable it's automatic mechanism. It can be disabled by
simply creating an empty file called $HOME/.nosyslogout in the user's home directory using e.g. the touch(1) command.
Any single configuration file in /etc/syslogout.d/ can simply be overridden by any user by creating a private $HOME/.syslogout.d/ directory
which may contain a user's own version of any configuration file to be sourced instead of the system default. It's names have just to
match exactly the system's default /etc/syslogout.d/ configuration files. Empty versions of these files contained in the $HOME/.syslo-
gout.d/ directory automatically disable sourcing of the system wide version.
Naturally, users can add and include their own private scripts to be automagically executed by /etc/syslogout at logout time.
OPTIONS
There are no options other than those dictated by shell conventions. Anything is defined within the configuration scripts themselves.
SEE ALSO
The README files and configuration examples contained in /usr/share/doc/syslogout/ and the manual page for bash(1), xdm(1x),
xdm.options(5), and wdm(1x). Recommended further reading is everything related with shell programming.
If you need a similar mechanism for executing code at login time check out the related package sysprofile(8) which is a very close compan-
ion to syslogout.
BUGS
syslogout in its current form is mainly restricted to bash(1) syntax. In fact it is actually a rather embarrassing quick and dirty hack
than anything else - but it works. It serves the practical need to enable a centralized bash configuration until something better
becomes available. Your constructive criticism in making this into something better" is very welcome. Before i forget to mention it: we
take patches... ;-)
AUTHOR
syslogout was developed by Paul Seelig <pseelig@debian.org> specifically for the Debian GNU/Linux system. Feel free to port it to and use
it anywhere else under the conditions of either the GNU public license or the BSD license or both. Better yet, please help to make it into
something more worthwhile than it currently is.
SYSLOGOUT(8)