Frequent question: How do you calculate in Linux?

How do you do math on Linux?

5 Useful Ways to Do Arithmetic in Linux Terminal

  1. Using Bash Shell. The first and easiest way do basic math on the Linux CLI is a using double parenthesis. …
  2. Using expr Command. The expr command evaluates expressions and prints the value of provided expression to standard output. …
  3. Using bc Command. …
  4. Using Awk Command. …
  5. Using factor Command.

9 янв. 2019 г.

What is the command for calculator in Linux?

bc command is used for command line calculator. It is similar to basic calculator by using which we can do basic mathematical calculations.

How do I use math in Linux terminal?

We are using the Ubuntu command line, the Terminal, in order to perform all the mathematical operations. You can open the Terminal either through the system Dash or the Ctrl+Alt+T shortcut.


+, – Addition, subtraction
*, / , % Multiplication, division, remainder
** Exponent value

How do you calculate in terminal?

Calculations with Calc

To open it, simply type calc in a terminal and hit Enter. Like bc, you’ll need to use typical operators. For example, 5 * 5 for five multiplied by five. When you type a calculation, hit Enter.

What do you understand by process in Linux?

Linux Processes Basics. In short, processes are running programs on your Linux host that perform operations such as writing to a disk, writing to a file, or running a web server for example. On the other hand, programs are lines or code or lines of machine instructions stored on a persistent data storage.

How do you add numbers in Linux?

Check: ./ Please enter a number: 50 The sum of 50 and 10 is 60. If you want the user to input the number as an argument to the script, you can use the script below: #!/bin/bash number=”$1″ default=10 sum=`echo “$number + $default” | bc` echo “The sum of $number and 10 is $sum.”

What is the use of scale keyword in Linux?

scale defines how some operations use digits after the decimal point. The default value of scale is 0. ibase and obase define the conversion base for input and output numbers. The default for both input and output is base 10.

Which command is used to show any message on Linux terminal?

5 Answers. Normally, a welcome message can be shown by customizing the /etc/motd file (which stands for Message Of The Day). /etc/motd is not a script but a text file which contents are shown before the first prompt of a login session.

What is command line calculator?

As a Linux administrator you might use the command line calculator many times in a day for doing some math, using bc command. … The command line calculator will allow us to perform all kinds of operations such as scientific, financial, or even simple calculation. Also, it can be used in shell scripts for complex math.

How do you add on Linux?

Here is another option for adding a user to a group in linux: 1. Use the usermod command. 2.

How to Add a User to Linux

  1. Log in as root.
  2. Use the command useradd “name of the user” (for example, useradd roman)
  3. Use su plus the name of the user you just added to log on.
  4. “Exit” will log you out.

How do I know my current shell?

How to check which shell am I using: Use the following Linux or Unix commands: ps -p $$ – Display your current shell name reliably. echo “$SHELL” – Print the shell for the current user but not necessarily the shell that is running at the movement.

How do I make a calculator in bash?


  1. res=` echo $a + $b | bc ` ;;
  2. res=` echo $a – $b | bc ` ;;
  3. res=` echo $a * $b | bc ` ;;
  4. res=` echo “scale=2; $a / $b” | bc `

25 февр. 2018 г.

What is top command used for?

top command is used to show the Linux processes. It provides a dynamic real-time view of the running system. Usually, this command shows the summary information of the system and the list of processes or threads which are currently managed by the Linux Kernel.

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