Most of Linux users are using wget from time to time, sometimes even when they don’t know about it – many GUI download managers for Linux are based on wget. Anyways wget is command line tool for downloading files over HTTP, HTTPs and FTP protocols… Read More »Wget Cookies: Download Protected Content
By default an average Linux distribution allows applications to use the following TCP port range for outgoing connections: 32,786-65,536. That’s why your system can handle up to 28,232 TCP sessions at time. Notice, this is more than enough if your Linux system is installed on… Read More »Quick Tip: Increase port range available for applications
Today I’d like to describe setup of sendmail that allows to establish receiving of e-mails for certain domain and sort incoming messages between virtual users. Those users must be able to fetch received e-mails via POP3 or IMAP protocols with or without TLS encryption. The… Read More »Sendmail for virtual users with procmail, spamassassin and dovecot
If you use Ubuntu (or other Linux distribution) and you wish to download some video from youtube.com into .flv file you can try using youtube-dl command line utility. It just downloads videos without any online applications, converters or etc. Type the following command in terminal… Read More »youtube-dl: download youtube videos in Ubuntu using command line
I hope many of you will agree that sometimes it’s really good idea to have some small amount of RAM mounted as a filesystem. It may be necessary when running some bash or perl script that handles, say, thousands of small files so it’s much… Read More »Fastest way to create ramdisk in Ubuntu/Linux
Centos 5.5 official repository is rather outdated for today so the latest Ruby available there is 1.8.6. If you need a newer version e.g. 1.8.7 you should install if from sources: 0. Install prerequisites: sudo yum install gcc zlib zlib-devel 1. Download the latest version… Read More »Install Ruby 1.8.7 from sources in Centos 5.5
[digg-me]In this post I will collect all commands which SHOULD NEVER be executed in Linux. Any of them will cause data loss or corruption, can freeze or hang up running system. NEVER RUN THESE COMMANDS IN LINUX BOX CLI! Even if somebody advises you in… Read More »13 Linux lethal commands
Yesterday really serious security bug was found in FreeBSD (from 7.1 to 8.0). Using public exploit local user can gain root privileges on vulnerable system. Below is an easy way solution to fix this terrible bug: % cd /usr/src/libexec/rtld-elf/ % fetch http://people.freebsd.org/~cperciva/rtld.patch % cat rtld.patch… Read More »Quick fix of FreeBSD rtld vulnerability
Update: Using Ubuntu Lucid Lynx? Here is corresponding article for you: Install Google Chrome (Chromium) on Ubuntu Lucid Lynx. One of the easiest way to try Chromium browser in Ubuntu Linux (Google Chrome browser for Unix/Linux operating system is named as Chromium) is to use… Read More »Install Ubuntu Chromium browser (Google Chrome for Linux)
Want to sort file contents by each line’s lenght? No problems:
artemn@artemn-laptop:~$ cat /etc/passwd | awk '{print length, $0}' | sort -n | awk '{$1=""; print $0 }'