Month: March 2016

Verify a Linux ISO’s Checksum and Confirm It Hasn’t Been Tampered With

Last month, Linux Mint’s website was hacked, and a modified ISO was put up for download that included a backdoor. While the problem was fixed quickly, it demonstrates the importance of checking Linux ISO files you download before running and installing them. Here’s how. Linux distributions publish checksums so you can confirm the files you

Explain linux directory structure

The following list provides more detailed information and gives some examples which files and subdirectories can be found in the directories: Linux directory structure / – Root Every single file and directory starts from the root directory. Only root user has write privilege under this directory. Please note that /root is root user’s home directory,

Slurm – Command line bandwidth monitoring tool for linux

Slurm is basically a network monitoring tool. It lets you monitor the traffic on network interfaces. Slurm visualizes network interface traffic using ascii graph. Install Slurm on Debian/Ubuntu Based Distribution. Installing slurm it is very simple, open the terminal and run the following command to install it. # sudo apt-get install slurm Once the installation is completed, you

Tcpdump Commands – A Network Sniffer Tool

tcpdump is a common packet analyzer that runs under the command line. It allows the user to intercept and display TCP/IP and other packets being transmitted or received over a network to which the computer is attached. Distributed under the BSD license,[3] tcpdump is free software. Tcpdump works on most Unix-like operating systems: Linux, Solaris, BSD, Mac OS X, HP-UX and AIX among others. In those systems, tcpdump uses the libpcap library to capture packets. The port of tcpdump for Windows is

Glances – Real Time System Monitoring Tool for Linux

Glances is a cross-platform curses-based command line monitoring tool writen in Python which use the psutil library to grab informations from the system. Glance monitoring CPU, Load Average, Memory, Network Interfaces, Disk I/O, Processesand File System spaces utilization. Glances can adapt dynamically the displayed information depending on the terminal siwrize. It can also work in a client/server mode for remote monitoring. Glances Features CPU Informations (user related applications, system core

Practical examples of the use lsof command

The Linux lsof command lists information about files that are open by processes running on the system. (The lsof command itself stands for “list of open files”.) In this tutorial show practical examples of the use lsof command. Some of the Linux distributions do not come with installed lsof packages. However, it can be installed as follows: Install lsof in

Nmon – linux monitoring tools

nmon is a beutiful tool to monitor linux system performance. It works on Linux, IBM AIX Unix, Power, x86, amd64 and ARM based system such as Raspberry Pi. The nmon command displays and records local system information. The command can run either in interactive or recording mode. Nmon is a short for Nigel’s performance Monitor.

Monitor MySql database using mytop command line monitoring tool

Mytop is a free and open source command line monitoring software for MySQL databases. Its similar in look to “top” command in Linux/Unix. Mytop monitors MySQL threads and the database’s overall performance, allowing system administrators or developers to get some insight on how applications are interacting with a database. Install Mytop on RHEL/CentOS and Fedora