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- THE BASIC CMD HACKING TOTORIAL HOW TO
- THE BASIC CMD HACKING TOTORIAL FULL
- THE BASIC CMD HACKING TOTORIAL WINDOWS
This ultimately lead the command prompt into obscurity. Things were not always like this but with the advent of GUI based operating systems, people started feeling that computing through command based tools was boring.
THE BASIC CMD HACKING TOTORIAL WINDOWS
That’s all for now, if you know any such Linux hacks or tricks you may share with us via our comment section and don’t forget to share this article with your friends….Command Prompt is one of the most powerful tools in Windows but sadly, it is also the most ignored one. You may run any sort of command in the parentheses and return back to your current working directory without a hitch. Also, it proves that command executed successfully. So in the above command it first changed the current directory to Downloads and then list the content of that directory before returning back to current directory. Sample Output -rw-r- 1 avi avi 54272 May 3 18:37 text1.txt May be you believe that the command didn’t executed and for some reason one or another it is not throwing error, since there is no change in prompt. Let see the example, :~$ (cd /home/avi/Downloads/)įirst it cd to directory Downloads and then again return back to home directory in one go. All you need to do is to run the command in parentheses i.e., in between ( and ). You may run a command no matter what it return back to the current directory. Well this is an amazing hack not many people know. Run a command and come back to the current working directory automatically. If we need to clear screen inside a shell script, call command ‘clear’, for all other cases I could think of now, ctrl+l is more than sufficient. So from next time use ctrl+l to clear your Linux Command Line Interface.Ĭonclusion: Since ctrl+l is a key combination, so we can not use it inside a script.
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Key combination ‘ Ctrl+l‘ has the same effect as ‘ clear‘ command. However if we make a habit of using key combination ‘ ctrl+l‘ to clear terminal, we will save a lot of time of ours. What we do to clear the screen? Well you may think how silly it is to ask such question.
THE BASIC CMD HACKING TOTORIAL HOW TO
How to Clear Terminal without Using ‘clear’ Command Read Also: 11 Linux Cron Job Scheduling Examples 2. However if we want to run certain test cases or I/O benchmark, then the above singe command will serve the purpose. The syntax for calling script at above described interval is: $ while true do /bin/sh script_name.sh sleep 100 done &Ĭonclusion: The above one liner is not a replacement of Cron, because Cron utility supports a whole lots of options, as compared and is very flexible as well as customizable.
THE BASIC CMD HACKING TOTORIAL FULL
Here is the command to call a script after certain interval (say 100 sec) and the name of script is script_name.sh.Īlso worth mentioning that the script above should be run in the directory where the script to be called lies, else you need to provide full path ( /home/$USER/…/script_name.sh). Similarly, we can execute any script in the same manner. & – Put the whole process in loop to background.Say if you want to execute the command every 6 minutes, you should use ( 6*60) 360, in succession of sleep. Note the time here is always measured in seconds. sleep 5 – It ask the shell to keep a time difference of 5 seconds before it executed again.
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Whereas > overwrite the file again and again.
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$ while true do date > date.txt sleep 5 done & To achieve this scenario, we need to run the below one liner script directly on the command prompt. Run a command (say date) every 5 sec and write the output to a file (say date.txt). Whenever we need to schedule a job, we call cron, but do you know we can schedule a job at a later time without corn? You can do it as suggested below. Scheduling a job/command in Linux is acronym to cron. In our efforts to bring those little hacks and tips for you that makes you different from others, here we have came up with three little tricks. The world of Linux is filled with so much fun and interesting stuffs, the more we go in, the more we find stuffs.