The sudo lastb command will list all recently logged in users on your Linux system. This is a useful tool on a server. jason@eyjafjallajkull:~$ sudo lastb jason :0 :0 Thu Jan 8 12:41 – 12:41 (00:00) jason :0 :0 Mon Jan 5 11:42 – 11:42 (00:00) jason :0 :0 Mon Jan 5 11:42 – 11:42 … Read more
This command will print out the model and make of your graphics card. This is another command to run on an unknown computer to see what hardware is in it. jason@eyjafjallajkull:~$ lspci -vnn | grep VGA -A 12 | head -n 1 01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Turks XT [Radeon … Read more
This code will pick a random word from the x[] array and include it in the printed string. This program will also get your current Linux username to customize the output. I am sure this code would be very useful to someone who wants to know how to handle arrays in C. #include <stdio.h> #include … Read more
Formatting a partition in Linux is very easy when you use the mkfs command. In this example I am formatting a 35 gigabyte partition with an EXT4 file-system. I am intending to try out a Linux From Scratch build and I want to have a dedicated partition to build this on. jason@eyjafjallajkull:~/Documents$ sudo mkfs.ext4 /dev/sdb2 … Read more
This is a laptop in Arma 3 that can be placed as an in-game decoration. This is running Linux! Apparently the military dumped Windows after the collapse of Microsoft in 2035. This is a good sign. Linux would be better and more reliable in the field compared to Windows anyway. I wonder what kernel version … Read more
This code will print the contents of a file to the terminal. Feel free to use this in your own projects if you wish. #include <stdio.h> #define MEM "/proc/diskstats" int main (void) { FILE *g; char Meminfo[40]; g = fopen(MEM, "r"); if(!g) { printf ("Sorry, I cannot open: %s.\n", MEM); } else … Read more
Deleting a directory on Linux is very easy indeed. The rmdir command will perform this task adequately. You could also use the rm -rf abc/ command to delete a directory, but rmdir is easier to remember. eyjafjallajkull% rmdir abceyjafjallajkull% rmdir abc The rmdir command will not be able to delete a directory that is not … Read more
This loop I wrote in C enables if statements inside a loop. This could be a useful thing to know. #include <stdio.h> int main(void) { int k; for (k = 0; k < 16; k++) { printf("* *\n"); if (k == 4 || k == 12) { printf("\n\t\t-\n"); } if (k == 8) … Read more
This code that I found: http://paste.scratchbook.ch/view/6f74b58f can run on a Linux machine and open a port invisibly. This allows access to a Linux server without the process showing in process manager and on a port scan of the machine. This might be controversial thing to post on a Linux focused website, but this might be … Read more
This function will allow your computer to speak. function shellspeak() { mplayer "http://translate.google.com/translate_tts?tl=en&q=$(echo $@ | sed ‘s/\s/+/’)" > /dev/null 2>&1; }function shellspeak() { mplayer "http://translate.google.com/translate_tts?tl=en&q=$(echo $@ | sed ‘s/\s/+/’)" > /dev/null 2>&1; } A script that will change all files in a directory to lowercase filenames. function lowercase() # move filenames to lowercase. { for … Read more