Boot your Linux server from rescue disk.
At boot: prompt, press F5 then type command linux rescue.
Find superblock locations for /dev/sda3:
# dumpe2fs /dev/sda3 | grep superblock
FSCK from Linux Rescue Mode
1. Boot server/VM in BIOS mode and change Boot Mode to CD
2. Boot server/VM from Linux CD
3. Hit F5 to enter Rescue Mode.
How to Reset root Password Linux Server in Rescue Mode
1. Boot server/VM in BIOS mode and change Boot Mode to CD
2. Boot server/VM from Linux CD
3. Hit F5 to enter Rescue Mode.
Disable NetworkManager on Redhat 6.x
The Network Manager service is currently enabled by default on Red Hat Enterprise Linux installations where one of these package groups was selected during installation:
Desktop
NM_CONTROLLED will be installed so that your network interface be managed the NetworkManager daemon. This means the traditional means of managing your network interfaces via the /etc/sysconfig/network-scripts/ifcfg-ethX files will no longer work. Thus, our problem.
BIND DoS vulnerability CVE-2015-5477 – Security fix for in CentOS, RedHat, Debian and Ubuntu Servers
Vulnerability Issue:
A flaw was found in the way BIND handled requests for TKEY DNS resource records. A remote attacker could use this flaw to make named (functioning as an authoritative DNS server or a DNS resolver) exit unexpectedly with an assertion failure via a specially crafted DNS request packet.
GHOST Vulnerability (glibc)
On January 27, 2015, the GHOST vulnerability was announced by Qualys. This vulnerability allows remote attackers to take complete control of a system by exploiting a buffer overflow bug in a glibc function GetHOST. This vulnerability should be considered serious and all affected servers should be patched immediately.
Generating a Certificate Signing Request (CSR)
To generate your CSR, you will need to log in to your server and use the OpenSSL software to generate a CSR and private key.
- Log in to your server, and enter the following command:
openssl req -nodes -newkey rsa:2048 -sha1 -keyout myserver.key -out server.csr
How to install JAVA JDK7 in CentOS 6
How to install DirectAdmin in CentOS
DirectAdmin is a graphical web-based web hosting control panel designed to make administration of websites easier.
Login as root.
