How do I run the same command multiple times in Linux?

How do you repeat a command in Linux?

You can use CTRL+O as many times as you want to keep re-executing the last commands. Method 6 – Using ‘fc’ cmmand: This is another way to repeat the last executed command. The ‘fc’ command is used to list, edit and re-run the previously entered command.

How do I run a command multiple times in Linux terminal?

How To Run a Command Multiple Times in Bash

  1. Wrap your statement for i in {1..n}; do someCommand; done , where n is a positive number and someCommand is any command.
  2. To access the variable (I use i but you can name it differently), you need to wrap it like this: ${i} .
  3. Execute the statement by pressing the Enter key.


How do I run a command 10 times in Linux?

The syntax is:

  1. ## run command 10 times for i in {1.. …
  2. for i in {1.. …
  3. for ((n=0;n<5;n++)) do command1 command2 done. …
  4. ## define end value ## END=5 ## print date five times ## x=$END while [ $x -gt 0 ]; do date x=$(($x-1)) done.
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How do you repeat a command in Unix?

There’s a built-in Unix command repeat whose first argument is the number of times to repeat a command, where the command (with any arguments) is specified by the remaining arguments to repeat . For example, % repeat 100 echo “I will not automate this punishment.” will echo the given string 100 times and then stop.

What is the repeat command?

A Repeat command performs a section of instructions among the End and repeats commands till the time the particularized condition is accurate. … If it is true, then the loop is exited then execution of the program recapitulates after the End command.

How do I wait in Linux?

When wait command is executed with $process_id then the next command will wait for completing the task of the first echo command. The second wait command is used with ‘$! ‘ and this indicate the process id of the last running process.

How do I run a program multiple times?

Open two instances of a program

  1. Open up the required program.
  2. Open this program again, but this time hold the Shift key and right-click on it. …
  3. Next, provide the username and password of the newly created account and press enter.
  4. Another instance of the same program will open up.


How do you repeat a bash command?

Basically, you get the “yes” command to repeat the string “ls” N times; while “head -n5” terminated the loop at 5 repeats. The final pipe sends the command to the shell of your choice. Incidentally csh -like shells have a built-in repeat command. You could use that to execute your command in a bash sub-shell!

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What does Time Command do in Linux?

time command in Linux is used to execute a command and prints a summary of real-time, user CPU time and system CPU time spent by executing a command when it terminates.

How do I write a script in Linux?

How to Write Shell Script in Linux/Unix

  1. Create a file using a vi editor(or any other editor). Name script file with extension . sh.
  2. Start the script with #! /bin/sh.
  3. Write some code.
  4. Save the script file as
  5. For executing the script type bash


How do I run a script every second?

Monitor Logged-In Users, Uptime and Load Average

To exit the command, press CTRL+C . Here, the ‘uptime’ command will run and display the updated results every 2 seconds by default.

How do I run a shell script every minute?

How to repeatedly run bash script every N seconds?

  1. If it suffices to run once a minute, you could use coron to run your script. …
  2. Yeah, but it will close current tty everytime. …
  3. What about wrapping your script (or its contents) in while :; do script; sleep 10; done ? – …
  4. @Jens, good idea!


How do I find previous commands in Unix?

To get previous command, hit [CTRL]+[p]. You can also use up arrow key.

Is command not found in Linux?

When you get the error “Command not found” it means that Linux or UNIX searched for command everywhere it knew to look and could not find a program by that name Make sure command is your path. Usually, all user commands are in /bin and /usr/bin or /usr/local/bin directories.

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What do you use to forward errors to a file?

2 Answers

  1. Redirect stdout to one file and stderr to another file: command > out 2>error.
  2. Redirect stdout to a file ( >out ), and then redirect stderr to stdout ( 2>&1 ): command >out 2>&1.
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