cron job

[unixshell]

i need to run cron job for every 30 mins to check tat inetd is running or not..

#cat /tmp/inetdtest
ps -ef | grep inetd >> /tmp/inetdcheck

crontab -e

30 * * * * sh /tmp/inetdtest

but cron job is not running ,, i am not getting the updates in /tmp/inetdcheck

i have checked the entry in var/adm/cron/cron.allow file also

[Johnson Punniyalingam]

what's permission of your /tmp/inetdtest file ?

ll -l /tmp/inetdtest

Change file permission

chmod 755 /tmp/inetdtest

rename the file to

mv /tmp/inetdtest /tmp/inetdtest.sh

crontab - entry as below also check space

30 * * * * /tmp/inetdtest.sh

Hope this Helps,

Regards,
Johnson

[Dennis Handly]

>ps -ef | grep inetd >> /tmp/inetdcheck

This is missing the interpreter line and replace grep by ps -C:
#!/usr/bin/sh
UNIX95=EXTENDED_PS ps -f -C inetd >> /tmp/inetdcheck

>30 * * * * sh /tmp/inetdtest

This should be:
0,30 * * * * /tmp/inetdtest

>but cron job is not running

Are you getting any mail messages?

> Johnson: Change file permission

Right. Better to use symbolic modes:
chmod a+x /tmp/inetdtest

[Vishu]

Hi,

first, check the permissions of your file /tmp/inetdtest. It should be executable. so do,

# chmod 755 /tmp/inetdtest

You can omit specifying the 'sh' in your crontab file.

# crontab -e

30 * * * * /tmp/inetdtest

[Steven Schweda]

> ps -ef | grep inetd >> /tmp/inetdcheck

You noticed that this may find itself, as
well as the real "inetd" process?

> [...] replace grep by ps -C:

Better, but anyone can write a program named
"inetd", and run it.

What are you really trying to test? Are you
looking for a running program named "inetd",
or do you wish to see if (the real) "inetd"
is doing its job properly? It might make
more sense to use a program like cURL,
Telnet, or wget, to see if you can reach some
real service (one which "inetd" would need to
start).

[Suraj K Sankari]

Hi,
Insted of this
>30 * * * * sh /tmp/inetdtest

It should like this
0,30 * * * * /tmp/inetdtest

Cross check your /tmp/inetdtest file it should be having executed permissions

Suraj

[unixshell]

hi steven

Better, but anyone can write a program named
"inetd", and run it.

What are you really trying to test? Are you
looking for a running program named "inetd",
or do you wish to see if (the real) "inetd"
is doing its job properly? It might make
more sense to use a program like cURL,
Telnet, or wget, to see if you can reach some
real service (one which "inetd" would need to
start).


how to do with using cURL,TELNET OR wget

[Viktor Balogh]

>how to do with using cURL,TELNET OR wget

if you have a http server, you can try this:

#!/usr/bin/sh
wget http://localhost/index.html 1>&2 2>/dev/null
if [ $? -ne "0" ]
then
echo "inetd might not running! Please check"
fi

[Viktor Balogh]

it goes the same with curl:

#!/usr/bin/sh
curl http://localhost/index.html 1>&2 2>/dev/null
if [ $? -ne "0" ]
then
echo "inetd might not running! Please check"
fi

[Steven Schweda]

> how to do with using cURL,TELNET OR wget

How to do _WHAT_?

> What are you really trying to test?

Still wondering...

> [...] 1>&2 2>/dev/null

Personally, rather than send this output
directly to "/dev/null", I'd save the it, and
include it in the e-mail which my script
would send to the system manager if the
operation failed. (Which is what I do in the
DCL procedure which I use on my main VMS
system to check on the Web server. My script
also searches the output for a "200" status
value in the response from the Web server.
As usual, many things are possible, depending
on exactly what one wishes to test.)

> echo "inetd might not running! Please check"

Not what I'd say. If I were testing the Web
server, and the test failed, then I'd
probably say something like "WWW Server Test
Failure.", and follow that with the details,
like, say, "Status 200 missing from log
file.", or "Log file () was
not created.", or something like that, and
leave the interpretation to the victim.

But that's just my opinion.