I think PxT is correct in saying that the DISPLAY variable is not set. You can set the $DISPLAY in cron, or in your srcipt / application.
If you just want some quick, simple notification, you could pop up an xterm on, say, $DISPLAY=":0", with a few lines of code:
Code:
#!/bin/sh
DISPLAY=":0"
Pay_Attention () {
echo "It is time for you to pay attention!"
echo "Press {Enter} when you are done..."
read _dummy_response
case $_dummy_response in
*) exit 0 ;;
esac
}
xterm -e Pay_Attention
exit
I'm sure there's a better way of doing that, but thats the first one that popped into my head... Heck, that as-is probably won't work, but it given you an idea of what I'm thinking, right?
Either way - the xterm will close when someone presses the enter key...
I have added a new experimental "Computer Science and Mathematics Trivia - True or False" section in the discussions, currently under the tags box.
In the future, I plan to
Expand this feature to add more trivia categories from math, science and technology.
Keep track of correct and... (20 Replies)
The UNIX and Linux Forums now has over 1000 TRUE / FALSE computer science and computer related trivia question in our database. These questions are of relatively high quality (compared to similar sites on the web) and are fun (according to feedback by users). In the first week during the... (1 Reply)
Thanks to Akshay, who helped me write the core MySQL queries, we now have two new draft leaderboards, by (1) member and by (2) country:
https://www.unix.com/trivia_stats.php
Currently milhan leads the members with a high score of 90%:
... (3 Replies)
Only a few days after I coded this new feature from scratch, we are seeing over 3000 entries in the database from members (mostly guests) playing CS trivia.
I have spend a lot of time coding this (from scratch) and testing the API. From the logs, it seems to have an API bug which appears... (31 Replies)
Just noticed that our successful computer trivia feature (stats here) has surpassed over 50,000 questions answered by users:
https://www.unix.com/trivia_stats.php
This was a coding effort worth while and I'm pleased to see so many people enjoying it in such a short time since it was released... (3 Replies)
Discussion started by: Neo
3 Replies
LEARN ABOUT CENTOS
pam_env.conf
PAM_ENV.CONF(5) Linux-PAM Manual PAM_ENV.CONF(5)NAME
pam_env.conf - the environment variables config file
DESCRIPTION
The /etc/security/pam_env.conf file specifies the environment variables to be set, unset or modified by pam_env(8). When someone logs in,
this file is read and the environment variables are set according.
Each line starts with the variable name, there are then two possible options for each variable DEFAULT and OVERRIDE. DEFAULT allows and
administrator to set the value of the variable to some default value, if none is supplied then the empty string is assumed. The OVERRIDE
option tells pam_env that it should enter in its value (overriding the default value) if there is one to use. OVERRIDE is not used, "" is
assumed and no override will be done.
VARIABLE [DEFAULT=[value]] [OVERRIDE=[value]]
(Possibly non-existent) environment variables may be used in values using the ${string} syntax and (possibly non-existent) PAM_ITEMs may be
used in values using the @{string} syntax. Both the $ and @ characters can be backslash escaped to be used as literal values values can be
delimited with "", escaped " not supported. Note that many environment variables that you would like to use may not be set by the time the
module is called. For example, HOME is used below several times, but many PAM applications don't make it available by the time you need it.
The "#" character at start of line (no space at front) can be used to mark this line as a comment line.
EXAMPLES
These are some example lines which might be specified in /etc/security/pam_env.conf.
Set the REMOTEHOST variable for any hosts that are remote, default to "localhost" rather than not being set at all
REMOTEHOST DEFAULT=localhost OVERRIDE=@{PAM_RHOST}
Set the DISPLAY variable if it seems reasonable
DISPLAY DEFAULT=${REMOTEHOST}:0.0 OVERRIDE=${DISPLAY}
Now some simple variables
PAGER DEFAULT=less
MANPAGER DEFAULT=less
LESS DEFAULT="M q e h15 z23 b80"
NNTPSERVER DEFAULT=localhost
PATH DEFAULT=${HOME}/bin:/usr/local/bin:/bin
:/usr/bin:/usr/local/bin/X11:/usr/bin/X11
Silly examples of escaped variables, just to show how they work.
DOLLAR DEFAULT=$
DOLLARDOLLAR DEFAULT= OVERRIDE=$${DOLLAR}
DOLLARPLUS DEFAULT=${REMOTEHOST}${REMOTEHOST}
ATSIGN DEFAULT="" OVERRIDE=@
SEE ALSO pam_env(8), pam.d(5), pam(8)AUTHOR
pam_env was written by Dave Kinchlea <kinch@kinch.ark.com>.
Linux-PAM Manual 09/19/2013 PAM_ENV.CONF(5)
07-25-2001
