CentOS
7 Ping Very Useful Examples Ping command is used to find out whether the peer host/gateway is reachable. 1. Increase or Decrease the Time Interval Between Packets You can increase or decrease this using option -i as shown below. Decrease Ping Time Interval – wait 0.2 seconds before sending
CentOS
Nslookup Command Examples To Check DNS Records Find out the domain IP address / A record [root@web ~]# nslookup arstech.net Server: 213.136.95.11 Address: 213.136.95.11#53 Non-authoritative answer: Name: arstech.net Address: 213.136.71.197 Find out the domain MX record [root@web ~]# nslookup
Linux
Restarting an interface in Ubuntu Server How to restart a network in Ubuntu Server without reboot sudo ifdown eth0 && sudo ifup eth0
Asterisk
Fail2ban Unban Single Host run: iptables -L For example we need to unban 10.110.11.16 Then get the actual jails list: fail2ban-client status Unban command is: fail2ban-client set jailname unbanip m.y.i.p For unban 10.110.11.16 IP from asterisk jail run command: fail2ban-client set
CentOS
Increase File Upload Size in PHP-Nginx How to fix “[error] client intended to send too large body” in Ubuntu Edit php.ini: vi /etc/php5/fpm/php.ini Set: upload_max_filesize = 10M post_max_size = 12M Then change Nginx config file: vi /etc/nginx/nginx.conf Set: http { #... client_
Linux
Apt-Get Install Apache Tomcat 7 on Ubuntu 14.04 sudo apt-get update sudo apt-get install tomcat7 tomcat7-docs tomcat7-admin tomcat7-examples then type: http://your_ip_address:8080 in your browser, and you will see next screen-shot: If you see “It works!” your tomcat successfully installed Install Java Development Kit (Optional) sudo
Linux
How to enable mod_rewrite for Apache a2enmod rewrite then restart apache2 server: /etc/init.d/apache2 restart or service apache2 restart
CentOS
SoX the Swiss Army knife of sound processing SoX (Sound eXchange), the Swiss Army knife of sound processing programs. SoX is a cross-platform command line utility, that can convert various formats of audio files in to other formats. Installing SoX on Linux For RHEL, CentOS like Linux: # yum install sox
Linux
Installing 3rd-party Open VM Tools Open VM Tools is the open source implementation of VMware Tools and consist of a suite of virtualization utilities that improves the functionality, administration, and management of virtual machines on VMware hypervisors. VMware recommends using the Open VM Tools redistributed by the operating system vendors.
CentOS
How do I resolve /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory issue On CentOS: sudo yum install glibc.i686 or sudo yum install glibc.i386 On Debian or Ubuntu: sudo apt-get install ia32-libs
CentOS
How to forward root emails to external email To forward Linux root emails create in root home directory file : .forward, put into this file email address Or putting email address into /etc/aliases, and then run newaliases command
CentOS
Understanding the Linux du Command: Estimating File Space Usage Effectively When managing a Linux system, monitoring file space usage is essential for ensuring efficient storage management. The du (Disk Usage) command is a powerful tool that helps users assess how much space individual files or directories occupy. Here’s an