On unix-like OS, the pkill command sends a signal to the processes while the pgrep command searches for processes currently running on the system. Originally, the pkill was written for using with the Solaris 7 (1998). kill, killall, pkill, pgrep can be used on all the GNU/Linux OS, MacOS X and Linux shell on Windows 10. The kill signals HUP (1) reloads a process, KILL (9) kills a process, TERM … [Read more...]
List of Command Line Music Players For Mac, Linux
Tools which uses text based user interface (TUI) is our one favourite topic. Many music lover want lightweight yet music players with visualizer & settings. Here is a List of Command Line Music Players For Mac, Linux. For developmental purpose, who are new readers of this website - previously we talked about TUI on SSH, how to develop TUI applications and also discussed about few command line … [Read more...]
Fail2Ban Log Analysis Bash Script For Report Generation
Previously we gave some complicated commands to our readers who use Fail2Ban and needs some checking. Other way was using BadIPs for creation of graph. Fail2Ban log analysis bash script is for report generation as list of attacker IPs, banned, unbanned, password attempts sorted by date, country. We written this easy script using various commands and we think it is useful to any sysadmin to quickly … [Read more...]
Install GoAccess Real-Time Web Log Analyzer : Apache, Ubuntu
Previously we published GoAccess guides for Nginx and Nginx log with GeoIP. Here in this guide we will show how to install GoAccess real-time web log analyzer for Apache webserver running on Ubuntu and in case of Apache you need not to separately work on how to enable Apache log to have GeoIP enabled features. Apache default log itself a standard format. Install GoAccess Real-Time … [Read more...]
How To Configure OCSP Stapling On Apache 2.4+
Previously we talked about OCSP, OCSP Stapling and OCSP Stapling on Nginx. Now, we will configure OCSP Stapling In Apache 2.4 It is important to avoid some settings of OCSP Stapling on a production website as it can give errors like OCSP Response Expired or just in case of Nginx 502. Here is how to configure OCSP Stapling on Apache 2.4+ with full configuration. These are among TLS optimisazion. In … [Read more...]
How To Perform Security Audits On Ubuntu 16.04 (With Lynis)
Security audit in our case is am automatic technical assessment of our server and web applications in the context of security by performing security vulnerability scans, reviewing application and operating system access controls some softwares or scripts. At the ens, we will gather a software generated audit report. Here is how to perform security audits on Ubuntu 16.04 with Lynis and other tools … [Read more...]
Install, Configure Advanced Policy Firewall (AFP) On Ubuntu 16.04
If you are a new user, you should not follow this guide for production sever but follow our basic server setup guide and IPTables guide to configure your firewall. New users can follow this guide with test/development servers. Advanced Policy Firewall is an iptables based firewall. Here is how to install, configure Advanced Policy Firewall (AFP) on Ubuntu 16.04. It is essentially an interface to … [Read more...]
List Of Anti Malware For GNU/Linux Server
We noticed that we need to deliver guides around some known things which are possibly not known to the new users. Somehow, many we missed talking about them since the year 2010. Anti Malware is not a fully correct phrase for Linux but the meaning is obvious. Here is a usable list of Anti-malware for GNU/Linux server. Malware is a program that aims to disrupt the normal operation of a server. … [Read more...]
Linux Server Security Hardening Commands
We have many hands on guides on specific softwares with all commands. Most of them needs time and not exactly covered all the issues. Here is a List of Linux Server Security Hardening Commands For the New SSH Users & New Sysadmins. Guide is For Cloud & Virtual Instances. The way to secure a dedicated server or colocation server will be different for various extra ways of access to physical … [Read more...]
Why No Output From Ubuntu 16.04 service start/stop Command?
Service nginx reload/restart Gives No Output Unlike 14.01. Is not it? This Article Explains Why No Output From Ubuntu 16.04 service start/stop Command. We should not be expecting such output. Earlier Ubuntu versions didn't behave this way because Ubuntu was an upstart system for a decade. In Ubuntu 15.04 and later version, systemd is only fully supported. So, that change from upstart to systemd … [Read more...]
Colorful diff on Command Line : OS X & GNU/Linux
diff is used to show the changes between two versions of the same file. Colorful diff on Command Line is Great to Read & There is Easy Way. man diff will bring the default diff utility's manual page. We can use this tool, but there is an existing easy way. First we will talk about the ways which many like to use, next we will talk about the easy way we like. First, for this guide, create … [Read more...]