- # the most useful and userfriendly introductory to unix commands, both for beginners and advanced users can be found at http://linux.about.com/?once=true&
 
      - # flip can be used to convert text files in the current directory and below from unix format (linefeed, 0x0a, LF) to windows format (carriage return + linefeed, 0x0d0a, CRLF):
        
 find . -type f -exec flip -d {} \; 
       
      - # flip can be used to convert text files in the current directory and below from windows format (carriage return + linefeed, 0x0d0a, CRLF) to unix format (linefeed, 0x0a, LF):
        
 find . -type f -exec flip -u {} \; 
       
      - # clean up an html page:
        
 tidy 
       
      - # reformat paragraphs in a text file:
        
 par 
       
      - # reformat a text file:
        
 fmt 
       
      - # what the fuck decodes acronyms:
        
 wtf wtf; wtf afaik 
       
      - # one-line information on many commands and programs:
        
 whatis whatis 
       
      - # more extensive information on a particular commands or item:
        
 man whatis 
       
      - # helpful information on built-in commands of the current shell (most probably bash):
        
 help help 
       
      - # fun with ascii art:
        
 for a in /usr/share/cowsay/cows/*cow;do fortune -s|cowsay -f $a;done|less
       
      - # and -- the auto nice daemon: automatically renices cpu-demanding processes
        
 sudo apt-get install and 
       
      - # kile -- a very user-friendly LaTeX front-end
 
      - # Dictionary lookup:
        
 dict term 
       
      - # Fortune cookies matching a specific pattern:
        
 fortune -i -m pattern 
       
      - # Gnome-based hex editor
        
 ghex2 
       
      - # List information on all open files that belong to all active processes, the status of the modules currently available to the kernel, a quick overview (interrupts, ioports, dma) on the currently installed hardware, the currently installed pci devices, and the currently active usb devices:
        
lsof; lsmod; lsdev; lspci; lsusb 
       
      - # Network load overview:
        
 netload eth0 -t 5 
       
      - # finding out which type of machine you are working on:
        
 uname -a 
       
      - # finding out some interesting information on a particular host or machine:
        
 nslookup -querytype=any hostname.domain.org
 whois --verbose ipaddress
 host -a hostname.domain.org nameserver.org
       
      - the following link provides very useful information on various frequently used unix commands: introduction to various unix tools