This PS1 example gives the user a pretend DOS shell prompt. This is very interesting and would be fun to play with for an experienced user, or to complete a Windows themed desktop environment like Cinnamon. That can be made to look just like Windows 10. And with this shell prompt, it could emulate the … Read more
There are many very useful shell tricks when using the bash shell on Linux or UNIX. Print the last used command-line arguments with a keyboard shortcut. ESC-. This will print the last used command-line arguments to the prompt. Very useful if it is a very long one-liner. Print a listing of your most-used commands and … Read more
This is a very simple, but nice shell prompt. PS1="\[\033[38;5;49m\]\w\[$(tput sgr0)\]\[\033[38;5;15m\]:\[$(tput sgr0)\]\[\033[38;5;43m\]\h\[$(tput sgr0)\]\[\033[38;5;15m\]@\[$(tput sgr0)\]\[\033[38;5;39m\]\u\[$(tput sgr0)\]\[\033[38;5;15m\]:\$?:\\$\[$(tput sgr0)\]"PS1="\[\033[38;5;49m\]\w\[$(tput sgr0)\]\[\033[38;5;15m\]:\[$(tput sgr0)\]\[\033[38;5;43m\]\h\[$(tput sgr0)\]\[\033[38;5;15m\]@\[$(tput sgr0)\]\[\033[38;5;39m\]\u\[$(tput sgr0)\]\[\033[38;5;15m\]:\$?:\\$\[$(tput sgr0)\]" This is what it looks like. /home/robert/Desktop:mycomputer@mario:0:$/home/robert/Desktop:mycomputer@mario:0:$ Another nice bash shell prompt. PS1="-\t– \u@\h [\w]\$ "PS1="-\t– \u@\h [\w]\$ " It looks like this. Not as good, but simpler than the above example. -12:01:11– … Read more
Using a nice big flat screen is a lot of fun with a modern PC, but how do you change the brightness of the screen with the command line? This is easy. Firstly, find the ID of your display using this command. 4.4 Wed Oct 16 jason@Yog-Sothoth 0: $ xrandr -q | grep " connected"4.4 … Read more
The ldd command will print out a list of all libraries that an executable is linked against. This is the output for a simple “Hello World” command. 20:15:31 tux@linux-v415 ($ ldd ./a.out linux-vdso.so.1 => (0x00007fff171ff000) libc.so.6 => /lib64/libc.so.6 (0x00007fe56ef58000) /lib64/ld-linux-x86-64.so.2 (0x00007fe56f2e8000) 20:15:49 tux@linux-v415 ($20:15:31 tux@linux-v415 ($ ldd ./a.out linux-vdso.so.1 => (0x00007fff171ff000) libc.so.6 => /lib64/libc.so.6 (0x00007fe56ef58000) … Read more
This command will print information about your swap partition easily using the Linux command line. root@Yog-Sothoth:~# swapon -s -v Filename Type Size Used Priority /dev/sda5 partition 7811068 0 -2 /dev/dm-1 partition 62500860 0 -3root@Yog-Sothoth:~# swapon -s -v Filename Type Size Used Priority /dev/sda5 partition 7811068 0 -2 /dev/dm-1 partition 62500860 0 -3 The –show parameter … Read more
This simple shell script will test your Internet connection and then tell you if it is up or not. wgetvar=$(wget -q –tries=3 –timeout=20 –spider http://google.com) if [ $? -eq ‘0’ ] then echo "Internet is up." else #some logging echo "Internet is down.." fiwgetvar=$(wget -q –tries=3 –timeout=20 –spider http://google.com) if [ $? -eq ‘0’ … Read more
This command will copy text to a pastebin online using curl. 4.4 Mon Sep 16 jason@Yog-Sothoth 0: $ echo "This is a message I want to save online." | curl -F file=@- https://0x0.st/4.4 Mon Sep 16 jason@Yog-Sothoth 0: $ echo "This is a message I want to save online." | curl -F file=@- https://0x0.st/ This … Read more
To recall the last entered command on the Linux console, press the Ctrl-P key shortcut. You may also press the up arrow to recall the command, but the Ctrl-P shortcut is another good way to perform this feat. The CTRL-A shortcut will jump to the beginning of the line you are currently typing and CTRL-E … Read more
This simple example shows how to check if a file exists or not. This is how we do this. if [ -f "/home/jason/foo" ]if [ -f "/home/jason/foo" ] Putting it together in a script makes it simple to verify if the file exists or not. if [ -f "/home/jason/foo" ] then echo "file does exist." … Read more
The OpenBSD operating system has many ways to get system info. One way is to use the sysstat utility. This returns comprehensive information about a running UNIX system. Run sysstat with no parameters and you will get output like this. 2 users Load 0.51 0.36 0.16 neo.home 10:32:19 memory totals (in KB) PAGING SWAPPING … Read more
Using the Network Manager CLI app to get information about your network connections is very simple. This allows a user to manage network connections without using a GUI. Linux users do not always use the desktop and use of the CLI is an important skill. So it is very good to be able to manage … Read more
This is a nice web scraper that will read a 4chan board and return a listing of all threads on that board page. This could be very useful code to expand into a useful script. #!/usr/bin/env bash set -e links=( $( wget "$@" -qo /dev/null -SO – | grep -oE ‘</span><a href=\"thread\/[0-9]+\"’ | … Read more
The smartctl utility for Linux is the best way to get comprehensive information about all of your hard drives in your Linux system. This can be used to get the health of your drives and see if they need replacing. This is how you do it. 4.4 Mon Mar 25 jason@Yog-Sothoth 0: $ sudo smartctl … Read more
Listing all available WIFI access points can be a hassle on Linux, but iwlist makes this very easy. It can be used to list verbose information about any WIFI access points that are near you. Used as root, it will list comprehensive information about each access point. Cell 08 – Address: 10:13:31:22:30:41 Channel:11 Frequency:2.462 GHz … Read more
If the user of an Ubuntu or Linux Mint machine has an Nvidia card, and the proprietary drivers are installed, then it is very easy to get information about their graphics card from the terminal. This simple one-liner will use awk to print the 4th 5th and 6th column of text in the output from … Read more
This very simple trick, prints the last used command in your bash history, with one weird trick. deusexmachina:~ jason$ echo !! echo ifconfig | awk ‘/inet / { print $2 }’ | sed -n 2pdeusexmachina:~ jason$ echo !! echo ifconfig | awk ‘/inet / { print $2 }’ | sed -n 2p To print the … Read more
This simple command will print the routing table from a Mac computer. deusexmachina:~ jason$ netstat -nr Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 192.168.1.1 UGSc 69 0 en0 127 127.0.0.1 UCS 0 0 lo0 127.0.0.1 127.0.0.1 UH 2 120 lo0 169.254 link#4 UCS 0 0 en0 192.168.1 link#4 UCS 0 … Read more
List only directories with the Linux command line. This lists a directory with all folders listed first, then return only the listing of folders in the directory. 4.4 Tue Oct 09 jason@Yog-Sothoth 0: $ ls –color=auto –group-directories-first -Hul | head -n `echo */ | wc -w` total 3866624 drwxrwxrwx+ 6 jason jason 4096 Oct 9 … Read more
Linux supports the creation of file hardlinks. This is a copy of a file that has the same inode as the original. If the copy is edited, the original is too. 4.4 Thu Oct 04 jason@Yog-Sothoth 0: $ ln missile.jpg missilenew.jpg 4.4 Thu Oct 04 jason@Yog-Sothoth 0: $ ls -hula -i -1 total 264K 14885009 … Read more