UGU Unix Guru Universe
For Unix Admins, By Unix Admins
Follow ugucom on Twitter      Search  in 
Home
BEGINNERS & USERS

Events

Internet
 
 Linux
BEGINNERS & USERS
Software
Linux Vendors
Usenet NewsGroups
Books & Publications
 
 Shop
Cool Admin Gifts!
Gadgets
T-Shirts
Books
 
 Unix Guru Universe
About
Add Link
Feedback
 
 
UGU: Unix Guru Universe - Unix Tip #4630- November 14, 2023 - Home : Help : Today's Tip
Unix Tip #4630- November 14, 2023

KEEPING AN EYE ON YOUR SYSTEM


Here is a little script sent
to use. While it doesn't
cover everything to watch
for on a system, it covers
some of the basics.

Use the following simple script
to check for security problems
on your system. Run it with
cron once a day and have it
mailed to you. (You will need
to modify it for your flavor
of Unix)

------------- CUT HERE ---------

echo LIST PASSWD AND SHADOW FILES TO CHECK FOR LAST DATE ACCESSED
echo
cd /etc; ls -l *passwd* *shadow*
echo
echo CHECK FOR USERS AND GROUPS THAT ARE EQUAL WITH ROOT
echo
grep ':00*:' /etc/passwd
echo
echo CHECK FOR USERS WITH SHELL ACCESS
echo
grep bash /etc/passwd
echo
echo LIST SU ACTIVITY
echo
cat /usr/adm/sulog
echo
echo CHECK FOR INVALID PASSWORDS
echo
grep invalid /usr/adm/syslog
echo
echo LIST THE LAST 20 LOGINS
echo
last |head -20
echo
echo CHECK THE HARD DRIVE SPACE
df




NOTE: All tips provided are USE AT YOUR OWN RISK. Tips are submitted by various unix admins around the globe. UGU suggest you read and test each tip in a non-volitile environment before placing into production.


LAST 5 TIPS
4629 - HOLIDAY INSURANCE....
4628 - CHMOD THE SYSTEM
4627 - EXECUTE SCRIPT FROM NETSCAPE
4626 - TASK ALERTS
4625 - NO WRITES TO PASSWORD FILE


I want to SUBSCRIBE and get a UGU Tip everyday.
I want to UNSUBSCRIBE and NOT get a UGU Tip everyday.

If you have a UNIX TIP let us know, we just may use it:
(All tips become the property of the Unix Guru Universe)
Email Address:

Yes, email me a Hot Unix Tip everday.

Enter Hot Unix Tip (optional):

Yes, I will support this tip

Captcha (not case sensitive):


Please enter the above letters:

 
Copyright 1994-2024 Unix Guru Universe