Linux is an open-source operating system (OS). An operating system is software that directly manages a system’s hardware and resources, like CPU, memory, and storage. The OS sits between applications and hardware and makes the connections between all of your software and the physical resources that do the work. Here, at https://blog.eduguru.in, We will discuss and solve real-life problems coming on Linux OS. We also know more interesting features of Linux here.
To unmount a Linux disk partition centos # umount /dev/sda1 Type the command to unmount /mnt forcefully: # fuser -km /mnt Where, -k : Kill processes accessing the file. -m : Name specifies a file on a mounted file system or a block device that is mounted. In above example you are using /mnt Linux … Read more
The organization(s) that migrate from legacy PABX system (traditional phone system) to IP based PBX (Private Branch eXchange), they require a very carefully planning before they deploy the VoIP. They need to ensure the QoS (Quality of Service) for VoIP in your organization. Step 1 Analyze your existing LAN (Local Area Network) and find if … Read more
Sample DAHDI installation After compiling and installing of dahdi and asterisk, you have to perform some further steps to use your hardware. This example will show you a few steps how to get asterisk and two Digium cards enabled: 1.) Detect your hardware # (this will generate /etc/dahdi/system.conf and /etc/asterisk/dahdi-channels.conf) linux:~# dahdi_genconf 2.) Read … Read more
To remove and add access to phpmyadmin in asterisk : Add your IP as follow: vi /etc/httpd/conf.d/phpmyadmin.conf <Directory “/usr/share/phpmyadmin”> Order allow,deny Allow from all </Directory> Here in Allow from all and Allow from 192.168.0.10 Then issue the following command: # service httpd restart Now All done.
Pre-Requisites Some basic computer skill and knowledge is assumed throughout this document. For any clearification and need for support you can mail us: info@eduguru.in . ViciBox Redux is a self-contained installation CD based upon the OpenSuSE v.11.1 32-Bit Linux distribution. It includes online as well as offline installation capabilities with support for both ViciDial stable … Read more
The vi Editor http://t4test.com/blog/unix-linux-shell-script-introduction-to-shell-scripting/ http://t4test.com/blog/read-making-shell-script-interactive/ http://t4test.com/blog/cpio-a-backup-program/ Backup Using TAR Backing up your files using tar is very simple you just type a little command. tar -cvpzf /BackupDirectory/backupfilename.tar.gz /ImportantData/directory/path Let’s suppose i have directory called /imp-data on root and i want to make backup of this directory including sub directories on different location like in /mybackupfolder. … Read more
a shell script which does the following to store the current day’s date in a variable ‘dt’: date “+%a %d/%m/%Y” | read dt echo ${dt} How would i go about getting yesterdays date into a variable?
You need to use route command. This command can manipulates the kernel’s IP routing tables. It can be also use to print gateway / router IP address. Type the following command to see default gateway: $ route -n Output: Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.0.10.54 0.0.0.0 255.255.255.0 U … Read more
Use your vi editor to create shell script, script.sh . This script runs three echo commands and shows the use of variable evaluation and command substitution. It also prints the calender of the current month. #!/bin/sh echo “Today’s date : `date` ” echo “This month’s calender:” cal `date “+%m 20%y` echo “My shell : $SHELL” … Read more
http://blog.eduguru.in/linux-2/the-vi-editor http://t4test.com/blog/unix-linux-shell-script-introduction-to-shell-scripting/ http://t4test.com/blog/cpio-a-backup-program/ http://t4test.com/blog/read-making-shell-script-interactive/ http://t4test.com/blog/root-system-administrator-super-user-part-1/ http://t4test.com/blog/etchosts-the-host-file/ VI editor VI operates in three modes for performing different functions. —-The Command Mode is used to enter commands that operates on text or control cursor motion. —-The Input Mode is used to enter text. —-The ex Mode (or last line mode) is used for line handling and substitution. … Read more