Administration – Page 13 – Linux and Other Stuff

Install rkhunter on CentOS 6.6

March 3, 2015 by admin

Rootkit Hunter (rkhunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. Rootkits are self-hiding toolkits secretly installed by a malicious intruder to allow that user to gain access to the server. Rootkit Hunter offers protection by comparing SHA-1 hashes of important files with known good ones in a online database … Read more

How can I get octal file permissions (numbers) from command line?

February 28, 2015 by admin

Usage: With files: With folders:

Check for DdoS Attack

February 26, 2015 by admin

More info: http://www.cisco.com/c/en/us/support/docs/security-vpn/kerberos/13634-newsflash.html

Can’t get FormMail.pl in cgi-bin to work

February 25, 2015 by admin

Formail.pl error: Check the permissions: Change to 755

Check the time of a running process

February 20, 2015 by admin

Find the process Find the process Note the time Time is in minutes 14 days, 22 hours, 24 minutes

How to find out the cause of linux server crash after rebooting

February 12, 2015 by admin

If you have a hardware RAID controller, I’d find out if you can read its log (if 3Ware, use tw_cli). And, whether you have hardware or software RAID, you can look at the SMART parameters of the disks (if the disks are connected to a RAID controller, you may need special commands to access them. … Read more

Find out serial / model number and vendor information for SATA and IDE hard disk

February 10, 2015 by admin

Getting hard disk model and number under Linux Try command as follows for /dev/sda (SATA). You need to pass -i or -I option which request identification info directly from the drive, which is displayed in a new expanded format: # hdparm -I /dev/sda # hdparm -I /dev/sda | grep Serial OR for IDE /dev/hda # … Read more

Yum update errors for ghost update

January 31, 2015 by admin

Running yum update on CentOS 6.2 produces errors: Here is more information on Matahari: https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/matahari.html Solution: Then run yum update again

Disabling Recursive DNS in the Plesk Panel and No Panels

January 30, 2015 by admin

To Disable Recursive DNS in the Parallels Plesk Panel Log in to the Parallels Plesk Panel as administrator. Click Tools & Settings. From the General Settings area, click DNS Template Settings. Click DNS Recursion.Select Localnets, and then click Ok. For Windows Servers: Log in to your Server through a Remote Desktop Connection. From the Start … Read more

Ghost Vulnerability

January 29, 2015 by admin

A very serious security problem has been found and patched in the GNU C Library called Glibc. It was announced on 27th January 2015.

Here are the affected Linux distros:

RHEL (Red Hat Enterprise Linux) version 5.x, 6.x and 7.x
CentOS Linux version 5.x, 6.x & 7.x
Ubuntu Linux version 10.04, 12.04 LTS
Debian Linux version 7.x
Linux Mint version 13.0
Fedora Linux version 19 or older
SUSE Linux Enterprise 11 and older (also OpenSuse Linux 11 or older versions).
SUSE Linux Enterprise Software Development Kit 11 SP3
SUSE Linux Enterprise Server 11 SP3 for VMware
SUSE Linux Enterprise Server 11 SP3
SUSE Linux Enterprise Server 11 SP2 LTSS
SUSE Linux Enterprise Server 11 SP1 LTSS
SUSE Linux Enterprise Server 10 SP4 LTSS
SUSE Linux Enterprise Desktop 11 SP3
Arch Linux glibc version <= 2.18-1

Read More to Fix the GHOST vulnerability on a CentOS/RHEL/Fedora/Ubuntu Linux