We work for earn money. We consume our time for money but sometimes we may be bored. Changing current work will made us more happy and will refresh our mind. Here we will provide some useful things to do when we are bored. Consuming time with useful work is important for us. Read Technical Tutorials I think the best way to improve our career is learning new things and implementing...
System or Network administrators looks ports and applications to solve problems. Getting port and application info in Linux can be done lsof command. But in Windows? netstat is a very popular and useful tool used to get network and port-related information. List Listening Port with netstat Command We will use netstat command like below in order to list which process, application or service listening which port on Windows. -a Display...
pip is a tool used to install Python modules from a central python repository. While using pip command there may be some error like ffi.h gcc .This error will look like below.
1 2 3 4 | #include <ffi.h> ^ compilation terminated. error: command 'gcc' failed with exit status 1 |
Install libffi-dev This problem is related to the libffi libraries. If libffi development libraries are not installed we will get this error. To solve the issue install libffi-dev on Debian/Ubuntu, libffi-devel on Redhat/Centos/Fedora. Solve For Ubuntu, Debian, Mint,...
There are times when we start virtual machine and want to get ip address quickly without open any GUI or connecting virtual machines console. Here is the tip. virsh domiflist Command
1 2 3 | #!/bin/bash VMNAME=$1 for mac in `sudo virsh domiflist $VMNAME |grep -o -E "([0-9a-f]{2}:){5}([0-9a-f]{2})"` ; do arp -e | grep $mac | grep -o -P "^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}" ; done |
The magic is that virtual machines interfaces are listed than mac address is grepped. After grepping mac address we are looking our ARP table to find corresponding ip address and put it to the screen. This script will...
We generally run jobs in bash in serial order. Serial order means one command runs and after completion other command starts. There is another way to run jobs which are named parallel. Running parallel means multiple jobs run at the same time side by side. Send Job To The Background We will start with a simple example where two ping commands will be run in the background at the same...
Linux history command is used to get previously used commands by the current user. The default size for the history command is 1000 which means that last 1000 command will be stored in history. While listing history of bash line numbers are provided too. This is not expected in some situations. To get history without line numbers following commands can be used. Printing .bash_history File Executed bash commands are stored...
