This howto will show you how to disable ipv6 on RHEL 6/7, CentOS 6 and CentOS7. IPv6 is enabled by default. In this article I summarize 3 configuration which needs to be changed to completely disable ipv6. Check the configuration of the existing network with the “ifconfig” command. If inet6 appears in the configuration, means […]
In this post i will show how to install Very Secure FTP (Vsftpd) and how to configure ftp server in linux Red Hat Enterprise Linux 6 (RHEL 6). Vsftpd is a GPL licensed FTP server for UNIX systems, including Linux. It is secure and extremely fast and it is stable. As an example I will install […]
Vsftpd stands for Very Secure FTP Daemon. Vsftpd is not just another popular Unix / Linux FTP Server, but vsftpd delivering outstanding performance by taking less memory. It is running under xinetd and allows you run one process less because xinetd is shared among various other small services. For those webmasters or blogger who intend […]
Red Hat Enterprise Linux 7 (RHEL 7) and CentOS 7 come with the new naming scheme for the network devices. These features change the name of network interfaces on a system in order to make the network interfaces fully predictable, fully automatic, easier to differentiate and that broken hardware can be replaced seamlessly. This affects […]
NetHogs is a opensource tools to monitor network bandwidth that was used by the process and program in linux operating system. NetHogs does not rely on a special kernel module to be loaded. When you hit the high network traffic issue on your linux server, you can immediately find which PID is causing the issue. […]
It is very important to know what are the activities for applications and users in linux operating system. This will very useful in later time or in case of problems. For this purpose, i would recommend psacct or acct tools to be install. psacct or acct is a free monitoring program to monitor users and […]
Nmon (Nigel’s Monitor) is a great performance monitoring tool for Linux operating system. It was written initially for AIX to monitor system performance. nmon for Linux can be used to collect informations on CPU, memory, network, disk I/O, top processes etc. System administrator can use nmon as a tuner or benchmark tool that will provide […]
Question : How to check when was my linux system last rebooted and how long was the system running ? Answer : The are several command to check last system rebooted. 1. Check last rebooted using “who -b” command : [root@server ~]# who -b system boot 2014-08-16 09:34 2. Check last rebooted using “last reboot” […]
AppArmor is a Mandatory Access Control (MAC) and security extension that provides a variety of security policies for Linux kernel. It is an alternative application to SELinux and included with Ubuntu. Most of the time you don’t need it to configure a secure system, and it usually causes more problems because some service wasn’t working […]
Hdparm is a free tool for linux to measure sequential disk performance which is primarily used to tune and optimize disk parameters or to set and view hard disk drive hardware parameters. It is working on SATA/ATA/IDE/SAS disk. The command below has been tested on CentOS 6.5 and running on VMware ESXi 4.1 virtual machine. […]
This post will show you the list of ldapsearch examples for 389 Directory. This ldapsearch examples assumes the following: a)This ldapsearch is search for uid in the directory. b)The 389 directory is configured to not support anonymous access, then the user “Directory Manager” and the password is required c)This ldapsearch command has been run on […]
Subversion is a open source version control system that will manages files and will keep the changes made to the files. With Subversion, it can help you to recovers the older files and directories and also to examine the history of your files and directories how they are changed all over time. This post will […]