Linux Tips, Hacks, Tricks, and Tutorials for Beginners | ServerNoobs A Beginners Guide to Server Management

Overview rkhunter (Rootkit Hunter) is a Unix-based tool that scans for rootkits, backdoors and possible local exploits. It does this by comparing SHA-1 hashes of important files with known good ones in online database, searching for default directories (of rootkits), wrong permissions, hidden files, suspicious strings in kernel modules, and special tests for Linux and FreeBSD. Instructions 1. Log into your …

How do I use grep command in Linux operating systems? Can you give me a simple example of grep command? The grep command searches the given file for lines containing a match to the given strings or words. By default, grep displays the matching lines. Use grep to search for lines of text that match one or many regular expressions, …

The Exim mail server has a lot of options/commands to find out the details of spammers easily from the command line. We can find out the mail queue details, spam mail sender details, spam mail counts etc from the link I mentioned above. Here is a script/piped-command to find out the spam mailing script’s location/folder in the server. It would …

How do I delete or remove a single file from within a tar ball under Linux operating systems? You can use the following syntax to delete a file from a tar ball:   tar --delete -f example.tar filename Example: Delete a File From a Tar Ball First, create a tar ball for testing purpose using the tar command, enter: # cd …

Memcached is a service that allows entire database tables to be stored in memory, drastically speeding up queries to those tables and alleviating database load. In WordPress and W3 Total Cache, the Memcached module allows you to store all cache tables in memory. This guide can be used to set up Memcached on CentOS. Install memcached through RPM The easiest way to install …

This is a series of lessons of “Basic Commands “ that focuses on command-line usage, in this serie you will learn the tools and tricks of the command line, which are in many cases faster, more powerfull, and more flexible than GUIprogram. Today in this part will show you the main commands to compress/decompress files using rar, bzip, tarball(tar) and gunzip. …

Many newcomers find it difficult use the find command at shell prompt under Linux. Find is nifty tool on remote server where UNIX admin can find out lot of information too. Find command can perform a search based on a variety of search constraints. It searches through one or more directory tree(s) of a filesystem, locating files based on some user-specified criteria. …