The screen is a terminal multiplexer. Using this, you can run any number of console-based-applications, interactive command shells, course-based applications, etc. You can use screen to keep running program after you accidentally close the terminal, or even after you log out and [...]
LINUX COMMANDS
6 Ways to Find Largest Top Files and Directory in Linux
Finding the size of large file and directories in Linux servers is one of the most important tasks that every system administrator came across in his daily tasks. So, every system administrator must know about multiple ways to find out [...]
13 Practical df Command Examples to Check Disk Space in Linux
The df command displays the disk space usage for the Linux filesystems. It displays the amount of total and free disk space available on the mounted file systems. Using the command, we can also find used blocks and inodes in [...]
How to Use Linux Hexdump Command with Practical Examples
Hexdump is a very useful Linux command for developers and application debuggers. It has ability to dump file contents into many formats like hexadecimal, octal, ASCII and decimal. This command takes a file, or any standard input, as input parameter [...]
A Guide to Kill Process in Different Ways on Linux
The kill command is used on linux and other Unix-like operating systems ( Solaris, AIX, HP-Unix, Mac). It doesn’t matter which operating system you are using to terminate processes without having to log out or reboot the computer. A process [...]
How to Install perf Tool on CentOS and Ubuntu
Perf is a performance counter for Linux. With it you can know many secrets of the running linux system. For example why L2 cache misses are happening. Why your disk is showing activity, which code paths are making the stalls [...]
Unix Z Commands – Zcat, Zless, Zgrep, Zegrep and Zdiff Examples
In this article let us review how to perform normal file operation on a compressed files using the powerful Linux Z commands.Some of these z commands uncompressed the file temporarily in the /tmp directory to perform the specified operation. Some [...]
How to Track Progress % of Commands (cp,dd,tar) in CentOS 6 / Fedora
When you copy a large file in terminal with simple cp command without flags, you might sometimes wonder whether it is really copying or the process got blocked somehow and it will actually never finish. The output is non existent [...]
Run Command Parallel on Multiple Hosts using PDSH Tool
PDSH is a very smart little tool that enables you to issue the same command on multiple hosts at once, and see the output. It is a high-performance and parallel remote shell utility. It can run multiple remote commands in parallel and [...]
Powerful SSH Command Options with Examples on Linux
SSH is a popular, powerful, software-based approach to network security. It is used for logging into a remote machine and for executing commands on a remote machine. Whenever data is sent by a computer to the network, ssh will automatically encrypts [...]
watch - Repeat Linux / Unix Commands Regular Intervals
A server administrator needs to maintain the system and keep it updated and safe. A number of intrusion attempts may happen every day. There are some other activities that maintain their log. These logs are updated regularly. In order to [...]
A Peep into Process Management Commands in Linux
A program in execution is called a process. While a program is an executable file present in storage and is passive, a process is a dynamic entity comprising of allocated system resources, memory, security attributes and has a state associated [...]
How to Manage Network using nmcli Tool in RedHat / CentOS 7.x
A new feature of Red Hat Enterprise Linux 7 and CentOS 7 is that the default networking service is provided by NetworkManager, a dynamic network control and configuration daemon that attempts to keep network devices and connections up and active [...]
Interface (NICs) Bonding in Linux using nmcli
Today, we'll learn how to perform Interface (NICs) bonding in our CentOS 7.x using nmcli (Network Manager Command Line Interface). NICs (Interfaces) bonding is a method for linking NICs together logically to allow fail-over or higher throughput. One of the ways to [...]