Some nice screenshots of various desktop environments from a few different operating systems They look very nice too. I wish they could be available on Linux. That would be great. The screenshot above shows the SGI IRIX operating system. This desktop looks just like FVWM and would be a nice fast desktop indeed. This could … Read more
The UNIX CDE desktop really is a good desktop environment, and very light on resources. I am using it on the Sparky Linux distribution, the developer has built it on a Debian based distro. There is a simple dialog with icons for changing font size and colors, as well as the desktop wallpaper. There are … Read more
On a Debian system, if you wish to download a package on your Linux system without installing it, use these commands. This is very useful if you wish to copy them to a USB drive and put them on another machine with the same Linux distribution. This is the aptitude package manager, this command allows … Read more
The shred command on Linux is the perfect way to remove files securely from your Linux system. With a large amount of iterations, it will ensure that it is very difficult to get the data back. the -u parameter will delete the file after the overwriting process. neo@deusexmachina:~$ shred -n 20 -u gegl-0.2.0.tar.bz2neo@deusexmachina:~$ shred -n … Read more
The BASH shell has many useful features that allow you to perform your tasks very easily. If you are running a program in a terminal and you wish to run another command whilst the first command is running, then press CTRL-Z to move the running process to the background. Then once you have finished the … Read more
The Linux desktop has undergone a significant change in layout since the earliest days of the Gnome desktop that we saw on Red Hat Linux back in the day. Those were the days of dial up Internet and 14″ monitors that were far smaller than the massive computer screens that we have now. And the … Read more
This command will show how many kilometers there are in a light year. jason$ units -t ‘1 light year/kilometers’ 9.4605284e+12jason$ units -t ‘1 light year/kilometers’ 9.4605284e+12 If I travelled 800m in 9.58 seconds how many miles per hour is this? jason$ units -t ‘800m/9.58s’ ‘miles/hour’ 186.80053jason$ units -t ‘800m/9.58s’ ‘miles/hour’ 186.80053 Using it this way, … Read more
Copying a file with sftp from one UNIX machine to another is very easy. The command below uses the SSH protocol and initiates a connection to the remote PC. ubuntu ~ $ sftp -P 443 [email protected] ~ $ sftp -P 443 [email protected] Press ENTER and type your password. The user will be presented with a … Read more
Creating an alias for bash makes remembering a command easier. This is how longer commands may be simplified. Here is an example. [jason@darknet:~] alias lseasy=’ls -lAhF'[jason@darknet:~] alias lseasy=’ls -lAhF’ This is the output. [jason@darknet:~/Videos] lseasy total 4.8G -rw-r–r– 1 jason jason 18 Mar 24 13:34 authrootseq.txt -rw-r–r– 1 jason jason 23K Mar 24 13:55 heap2.htm … Read more
Here is one for any experimenters out there… It is possible to create files which simply cannot be deleted from the standard shell. To do this you will have to physically create the file using a script or a text editor, and you will have to use a sequence of control characters which cannot be … Read more
The virtual console on a Linux box is a good way to access the command line on a UNIX or Linux system. There are a few virtual consoles available on a machine. Press Ctrl-Alt-F2 to access the virtual console. Hold the Alt key and use the arrow keys to switch between virtual consoles. There is … Read more
How to define a string and print it out with the printf() function. #include <stdio.h> /* Defining a global string. */ #define hi "Hello Sire." int main(void) { /* Printing out the string. */ printf("%s\n", hi); return 0; }#include <stdio.h> /* Defining a global string. */ #define hi "Hello Sire." int … Read more
The sipcalc utility for Linux is used to calculate subnets for IP addresses. The below example shows a /26 address and the available IP addresses and number of network nodes in the subnet. This is a good way to calculate the network mask if the network administrator requires this information to input it into a … Read more
To reboot your Linux machine, use the sudo reboot command. Another way is to type sudo shutdown -r now. This command will also shut down your machine. ┌─[jason@darkstar]─[~] └──╼ $sudo init 0┌─[jason@darkstar]─[~] └──╼ $sudo init 0 Use this command to reboot your computer. ┌─[jason@darkstar]─[~] └──╼ $sudo init 6┌─[jason@darkstar]─[~] └──╼ $sudo init 6 To lookup the … Read more
Get your uptime with the uptime command on Linux. Last login: Tue Oct 28 13:55:23 on ttys000 iMac05:~ admin$ uptime 11:24 up 111 days, 20:38, 2 users, load averages: 0.35 0.16 0.14Last login: Tue Oct 28 13:55:23 on ttys000 iMac05:~ admin$ uptime 11:24 up 111 days, 20:38, 2 users, load averages: 0.35 0.16 0.14 The … Read more
The netstat command may be used to show the routing tables for your network connection easily. Use the netstat -r command to achieve this. iMac05:~ admin$ netstat -r Routing tables Internet: Destination Gateway Flags Refs Use Netif Expire default 172.18.31.1 UGSc 31 0 en0 127 localhost UCS 0 0 lo0 localhost localhost UH 0 … Read more
The route command on Linux will show the kernel routing table, this is very useful as in my case, when you are using a VPN and you need to see the routing table. This is an example, I am viewing the routing table on my Ubuntu 14.04 machine running OpenVPN. jason-H55-USB3 [route -v] ~ 14-10-17 … Read more
The movie Elysium showcased some awesome UNIX shell commands. The rhost command was one, there is a more detailed show here: http://i.imgur.com/niqfmy5.png. The nmap port scanning utility is used to port scan Matt Damon`s brain before the data is copied from his neural storage to the Elysium computer system. I cannot see the full command; … Read more
This example uses sed to replace the beginning word of a sentence. Administrator@WIN-EM8GK0ROU41 ~ $ echo "this is a line of text." | sed "s/this/This/gi;" This is a line of text.Administrator@WIN-EM8GK0ROU41 ~ $ echo "this is a line of text." | sed "s/this/This/gi;" This is a line of text. This is a better way to … Read more
This video shows how to use the SFTP command on Linux and transfer files easily. How to use sftp to retrieve files from a remote Linux server securely. https://securitronlinux.com/debian-testing/how-to-use-sftp-to-retrieve-files-from-a-remote-linux-server-securely/. Copy a file from one UNIX/Linux machine to another using the sftp utility. https://securitronlinux.com/debian-testing/copy-a-file-from-one-unixlinux-machine-to-another-using-the-sftp-utility/. How to upload files to your Amazon AWS instance using the bash … Read more