What is grep ? Grep stands for Global Regular Expression Print. Grep utility is usually used to find lines in a file/files containing particular strings and substrings. Grep comes preinstalled on any modern Linux distribution, so we can start using it without having to install anything. Before we start looking at usage examples of grep
What is awk? Awk is a programming language which has loops, arrays, functions etc., but nowadays mostly used only for “one-liners”. Awk is not used for creating complex programs, but it is great when we need to add some additional functionality to our standard Linux commands. We will have a look at some of its
In this guide we will walk through the process of creation a bootable Linux USB drive in Windows. After you will have created a bootable Linux USB drive you will be able to boot from it on any PC and install your Linux distro on that PC. STEP 1. Download Linux distrubution of your choice.
Command ‘ifconfig’ not found in Ubuntu 18.04 ifconfig utility has been deprecated and completely removed in Ubuntu 18.04 If you try to run ifconfig you will get error: administrator@ubuntu:~$ ifconfig Command 'ifconfig' not found, but can be installed with: sudo apt install net-tools You may install ifconfig utility by running sudo apt install net-tools or you
How to display a name instead of CallerID for a call coming from PSTN CID Lookup Source is a feature that allows us to display names instead of CallerID numbers for incoming calls from PSTN. For example, you might want to add your colleagues’ names and cell phone numbers to the list, so when they
Cisco UCS C220-M5 server boot options missing. Today I have unpacked and installed a brand new Cisco C220 M5 server for one of our customers. That was, by the way, the first M5 server I worked with. I did everything as usual: Assigned IP address to CIMC Configured RAID array Installed ESXi 6.7 After I
Call recording in FreePBX. FreePBX allows us to enable call recording without any additional hardware and licenses. It also has a web interface for playback, so we can easily find the recordings and listen to them using only built-in tools. In this post we are going to look at the call recording configuration steps for
The configuration of DHCP server on Aruba switches is pretty similar to the configuration of DHCP server on Cisco switches, except that Aruba switches require dhcp-server explicitly enabled on an interface. First, we have to configure L3 interface on our switch, the snippet below shows how to assign IP address(192.168.1.1) to VLAN 1. Now that
What is IVR greeting? IVR greeting (also called Auto-Attendant Greeting) is what you hear when you call some company’s number, like “Thank you for calling, If you know the extension number, please, dial …”. IVR configuration in FreePBX 13. FreePBX allows you to configure IVR greetings without complex CLI commands and scripts, using only
