CentOS Howtos and Tutorials
Centos Linux tutorial for beginners and advanced users with special focus on security, firewall, web, mail, file and proxy servers in an enterprise environment (rss feed).
am using NFS server version 4.x on a CentOS/RHEL based system. I'm mounting my shared /var/www/ directory on five Apache based nodes using the following syntax:
mount -t nfs4 -o rw,intr,hard,proto=tcp rocknas02:/httproot/www /var/www/
I noticed that due to bug in my app user can sometime upload executable or other device files to get out of chrooted Apache server. How can I prevent such security issues on a CentOS or RHEL based NFS client and sever setup?
[click to continue…]
am a new RHEL / Centos Linux server admin. I would like yum to update all packages except the Linux Kernel. How can I prevent yum command
from updating kernel on a CentOS/RHEL/Fedora Linux based systems? [click to continue…]
am a new CentOS / RHEL 6.x server user and DevOP. I need to lock a package called nginx on a server being updated via yum command
. How do I lock package version at a particular version on CentOS / Red Hat Enterprise Linux (RHEL) 6.x or Fedora Linux? [click to continue…]
am a new CentOS Linux user. How do I change default sshd tcp port # 22 to 2022 on CentOS Linux version 5/6? [click to continue…]
s there is a tool that can provide me a maximum of information (such as cpu, disk I/O, network, nfsd, memory and more) about my Linux/Unix server in a minimum of space in a terminal? [click to continue…]
am a new CentOS / RHEL / Red Hat / Fedora Linux server user. I need to provide tidy library support using php. How do I install php-tidy on RHEL or CentOS Linux for Apache server? [click to continue…]
would like to see detailed information on the history of yum transactions such as updates, deleted packages, and other information. How do I see history of yum commands on CentOS / RHEL 6.x based server? How do I undo or redo or rollback packages using yum command
? [click to continue…]