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Grep Command some examples of grep command: * Print Apache’s documentroot directory name: $ grep -i documentroot /etc/httpd/conf/httpd.conf * View file contents without comments and empty lines: $ grep -Ev “^$|^#” /etc/my.cnf * print only IP address assigned to the interface: $ ifconfig eth0 | grep ‘inet addr:’ | cut -d’:’ -f2 | awk […] FIND Command Find is a versatile tool which can be used to locate files and directories satisfying different user criteria. But the sheer number of options for this command line tool makes it at the same time both powerful and encumbering for the user. Here I will list a few combinations which one can […] MYSQL Back On Unix Shell script is a script where we are writing different types of commands and executing those commands from a single file. We can execute that command manually, by entering command one by one. But if we use shell script we have to write those commands into a text file for […] Limiting Spam and Attacks Security – Training You can use a bridge to effectively limit spam and attacks by managing the IP Ranges per Country.The basis behind the thought here is that these IP Address Ranges probably do not need access to your network in any way, unless you are an International business. By blocking […] Bind Configuration in Chroot Environment Wriiten by Babar Zahoor Dated:12-01-2010 Pupose: Configuration of DNS (Bind) server in chroot environment. OS CentOS 5.4 X86_64 ————————————- Please Install the bind packages ————————————- [root@ns1 ~]# yum install bind bind-utils bind-* Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * addons: virror.hanoilug.org * extras: ftp.hostrino.com * updates: ftp.hostrino.com […] CentOS 6 vsftpd 2.2.2 su – root yum install vsftpd cd /etc/vsftpd/ vi config anonymous_enable=NO This is set to YES by default. local_enable=YES This is set to NO by default and change when you want the local users to have ftp access. xferlog_enable=Yes This is set to NO by default. Your logs will be written […] 10 Apache Security and Hardening Tips Tip No. 1: Disable Apache Signature and/or Apache Banner # ServerSignature Off # ServerTokens ProductOnl Tip No. 2: The Trace HTTP Request Add the following to the web-server’s configuration file. For example alter the following file in Ubuntu: /etc/apache2/apache2.conf . * TraceEnable off Tip 3: Remove PHP scripts […] Performance tuning a CentOS LAMP web server for high traffic volumes This document is prepared and Posted on August 17, 2010 by William Jamieson – Thank you very much William 🙂 Performance tune a LAMP server to handle approximately 70 full page loads per second which equated to 4,250 concurrent virtual users. We ended […] swap issues on Linux clear the swap usage free -to (Total memory usage) free -m (Memory usage of swap) swapoff -a && swapon -a ( swap off and on) free cat /proc/swaps sync; echo 3 > /proc/sys/vm/drop_caches To free pagecache: # echo 1 > /proc/sys/vm/drop_caches To free dentries and inodes: […] |
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