This is a very strange shell trick that allows you to have a set of parameters to a Linux command that are separated by single quotes. [homer@localhost ~]$ df -h’l’a’T’ Filesystem Type Size Used Avail Use% Mounted on rootfs rootfs 216G 75G 130G 37% / proc proc 0 0 0 – /proc sysfs sysfs 0 … Read more
Some very useful Linux shell commands and tricks. Print numbers in sequence. [homer@localhost ~]$ seq 8 24 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24[homer@localhost ~]$ seq 8 24 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 … Read more
Linux hardware information commands. There are many commands available for Linux that allow the user to get information about their hardware. Here is a handful of them. The lshw command is very useful for getting information about your installed hardware. ubuntu ~ $ sudo lshw -short H/W path Device Class Description ============================================================================================================================================== system HVM domU … Read more
The WIFI Radar application for Linux is used to perform a wireless site survey to determine the signal strength of a wireless network that you are deploying at a particular site. This application makes a survey of wireless signal strength very easy indeed. The SSID/MAC address of the access point is shown, as well as … Read more
The md5sum command on Linux is used to get a number that is the checksum of the file. This is commonly used to verify downloaded files to check that the file has not been modified. Below is an example, the md5sum command is used on a BMP file and I get the file checksum output … Read more
I am using this command to search the Internet for open ports on port 80 with nmap. sudo nmap -sS -iR 0 -p 80 -oG nmap.grepablesudo nmap -sS -iR 0 -p 80 -oG nmap.grepable Then I use this command in another terminal tab to view the updating file. This will be updated every two seconds … Read more
This is how to do this; just add the backticks and you may then echo the output of the logname command in this echo string. echo "Hello `logname`, this is a nice day is it not?"echo "Hello `logname`, this is a nice day is it not?" This will add the output of the command by … Read more
I have uploaded my sysinfo program to GitHub, this makes it easier for me to manage the code and have a revision control system to control changes to the code. I have added code to print information about your Motherboard and the BIOS. I wish there was a proper programming interface to get this information … Read more
How to setup Ubuntu 13.10 with a proper desktop environment. I just installed Ubuntu 13.10 and I had to update the package repositories. This is essential to install software. homer@deusvult:~/Documents$ sudo apt-get updatehomer@deusvult:~/Documents$ sudo apt-get update After this I could install the initial set of packages to setup my system. homer@deusvult:~/Documents$ sudo apt-get install me-tv … Read more
This is a strange bash piping method that actually does work. This pipes the output of one echo command and appends it to another. ubuntu ~ $ echo "Hello World" >| echo "Me" > out.txtubuntu ~ $ echo "Hello World" >| echo "Me" > out.txt This is the result of this strange command. ubuntu ~ … Read more
This is a shell script that will only run if the user executes it as the root user. I got this tip here: http://www.cyberciti.biz/tips/shell-root-user-check-script.html. #!/bin/bash CMDROOT="yum update" if [[ $EUID -ne 0 ]]; then echo echo "You must be a root user to run this command." 2>&1 exit 1 else echo echo … Read more
The bash $PS1 generator here: http://www.kirsle.net/wizards/ps1.html allows you to create a cool bash shell prompt with a minimum of fuss. You can add colors to various parts of the prompt and make it look very nice indeed. Check it out now and see what you think. Here is one that I made. This uses tput … Read more
This is one command that you should never run on Linux. $(echo 726d202d7266202a | xxd -r -p)$(echo 726d202d7266202a | xxd -r -p) This is the text string “rm -rf *”” that is converted to hexadecimal and then put into this command. This will erase all of your files if you run this in your home … Read more
http://www.scribd.com/doc/12918020/Linux-Starter-Pack; The Linux starter pack. This is very good as an introduction to the Linux desktop and the various utilities available. http://tille.garrels.be/training/bash/; Introduction to Linux guide for beginners. This is a good resource if you want to learn more about the Linux shell and usage in general. http://securitron.securitronlinux.com/lc/rute/; Rute User’s Tutorial and Exposition. The definitive … Read more
http://gnome-look.org/content/show.php/GNOME+Shell%3A+Nord?content=142971. Nord Gnome Shell theme, now compatible with Gnome 3.6. http://gnome-look.org/content/show.php/LittleBigMod_2nd?content=152088. LittleBigMod Gnome Shell 3.6 theme. A very good and sleek theme. http://gnome-look.org/content/show.php/London+Smoke+-+Gnome-Shell?content=142426. London Smoke theme for Gnome Shell 3.4. http://gnome-look.org/content/show.php/malys+-++GS?content=142262. Malys theme for Gnome Shell 3.4.1. Another quality theme for your Linux desktop. http://gnome-look.org/content/show.php/Darkair+%28+3.4%2B3.6%2B3.8%2B3.9.2%29?content=156215. Darkair Gnome Shell theme. A theme with a lovely orange … Read more
This is another way to see where you are in the directory stack. homer@deep-thought ~/Documents/basenew $ echo $DIRSTACK ~/Documents/basenewhomer@deep-thought ~/Documents/basenew $ echo $DIRSTACK ~/Documents/basenew Here is another way to show the $PWD value one directory down from where you are now. homer@deep-thought ~/Documents/basenew $ echo $OLDPWD /home/homer/Documentshomer@deep-thought ~/Documents/basenew $ echo $OLDPWD /home/homer/Documents This example shows … Read more
Here I am using the watch ‘tail access.log’ command to watch the access log file for the Apache web server. This will update every two seconds and show changes to the logfile when someone accesses the server. Every 2.0s: tail access.log Tue Jul 2 10:26:04 2013 77.78.106.75 – – [30/Jun/2013:18:03:09 +1000] "HEAD / HTTP/1.0" … Read more
Using wildcards on the Linux command line This is a standard listing of files with wildcards in the bash shell. homer@deep-thought ~/Documents $ ls *.wad basenew.wad cc4-tex.wad city-heat.wad dark.wad doom.wad plutonia.wad scythe2.wad SKYTEST.wad brick.wad cchest4.wad consoleCopy.wad doom2.wad hexen.wad RIII.wad scythex.wad SODfinal.wadhomer@deep-thought ~/Documents $ ls *.wad basenew.wad cc4-tex.wad city-heat.wad dark.wad doom.wad plutonia.wad scythe2.wad SKYTEST.wad brick.wad cchest4.wad … Read more
The Gnome Shell desktop on Linux Mint 15 is a pretty good desktop environment for any Linux user, but after typing sudo apt-get install unity on Linux Mint 15 and trying it out, I actually think that the Unity desktop is the faster of the two. Despite the Macintosh styled interface. The ability to quickly … Read more
TRON Legacy GDM theme: http://gnome-look.org/content/show.php?content=117133. This will also work with MDM in Linux Mint 15. TRON Legacy Gnome Shell theme: http://half-left.deviantart.com/art/GNOME-Shell-Tron-Legacy-208220836. This theme is very reminiscent of the theme that the computer uses in the movie. You need to install the User Themes extension to load this theme. TRON Legacy lightcycle wallpaper: http://www.moviedeskback.com/wp-content/uploads/2010/07/Tron-Legacy-Wallpapers-1600×1200-6.jpg. Die Hard … Read more