Write a shell script to check if you are root or not?

Granville Weissnat asked a question: Write a shell script to check if you are root or not?
Asked By: Granville Weissnat
Date created: Tue, Jun 1, 2021 8:19 AM

Content

FAQ

Those who are looking for an answer to the question «Write a shell script to check if you are root or not?» often ask the following questions:

💻 How do i write a shell script?

  • To successfully write a shell script, you have to do three things: Write a script. Give the shell permission to execute it. Put it somewhere the shell can find it.

💻 How to write a shell script using bash shell in ubuntu?

  • Steps Launch the Terminal. Launch the vi/vim editor. Type vim ListDir.sh and hit ↵ Enter. Type the following code: #!/bin/bash. Type the code as shown in the figure. Exit vim. Change the access permissions. Run the scrip.

💻 Can we write java code in shell script?

* We can write java commands like shell script and execute it. * Just write commands in a way that we give in jshell and save it in a file and execute it.

1 other answer

[ $UID -ne 0] # Checks if the user ID is not 0 (root UID)

Your Answer

We've handpicked 21 related questions for you, similar to «Write a shell script to check if you are root or not?» so you can surely find the answer!

How do you write an argument in a shell script?

Arguments or variables may be passed to a shell script. Simply list the arguments on the command line when running a shell script. In the shell script, $0 is the name of the command run (usually the name of the shell script file); $1 is the first argument, $2 is the second argument, $3 is the third argument, etc...

Read more

How do you write to a file in shell script?

  1. #!/bin/bash.
  2. #Script to write the output into a file.
  3. #Create output file, override if already present.
  4. output=output_file.txt.
  5. echo "<<<List of Files and Folders>>>" | tee -a $output.
  6. #Write data to a file.
  7. ls | tee $output.
  8. echo | tee -a $output.

Read more

Is shell script bash?

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. Bash can also read and execute commands from a file, called a shell script…

Read more

What is shell script?

  • A shell script is a text file that contains a sequence of commands for a UNIX-based operating system.

Read more

When a shell script is executed shell?

  1. Open the terminal. Go to the directory where you want to create your script.
  2. Create a file with . sh extension.
  3. Write the script in the file using an editor.
  4. Make the script executable with command chmod +x <fileName>.
  5. Run the script using ./<fileName>.

Read more

Is shell script and batch script same?

A batch file is a script file in DOS, OS/2 and Microsoft Windows. It consists of a series of commands to be executed by the command-line interpreter, stored in a plain text file… Unix-like operating systems, such as Linux, have a similar, but more flexible, type of file called a shell script.

Read more

How to check if string is blank in shell script?

  • You can't use else if here, because that would cause the "$myVar" == "" condition to be parsed even when the first condition is true. If you want to treat the empty and the undefined case in the same way, first set the variable: You can use test (1). For example: Both assume that $myVar is set.

Read more

Shell script to check if a string is a palindrome?

len=0i=1echo -n "Enter a String: "read strlen=echo $str | wc -clen=expr $len - 1halfLen=expr $len / 2while [ $i -le $halfLen ]doc1=echo $str|cut -c$ic2=echo $str|cut -c$lenif [ $c1 != $c2 ] ; thenecho "string is not palindrome"exitfii=expr $i + 1len=expr $len - 1doneecho "String is Palindrome"

Read more

How do you write an if else condition in shell script?

  1. if statement. This block will process if specified condition is true…
  2. if-else statement…
  3. if..elif..else..fi statement (Else If ladder) ...
  4. if..then..else..if..then..fi..fi..(Nested if) ...
  5. Syntax: case in Pattern 1) Statement 1;; Pattern n) Statement n;; esac…
  6. Example 2:

Read more

How do you write and call a function in shell script?

You need to define your functions before you call them. Using () : process_install() { echo "Performing process_install() commands, using arguments [${*}]..." } process_exit() { echo "Performing process_exit() commands, using arguments [${*}]..." }

Read more

What is a shell script or shell scripting?

  • A shell script is a computer program designed to be run by the Unix shell , a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text.

Read more

Can mac run shell script?

Shell scripts must be executable files in order to run. You can use the chmod command to indicate that the text file is executable (that is, its contents can be run as a shell script).

Read more

Can we debug shell script?

A debugger is a tool that can run a program or script that enables you to examine the internals of the script or program as it runs. In the shell scripting we don”t have any debugger tool but with the help of command line options (-n, -v and -x ) we can do the debugging.

Read more

Does shell script need sh?

If you're running your script from the shell, you don't actually need the #!/bin/sh shebang as outlined in this this answer–every Unix-like system I've used, including OS X, will default to /bin/sh if no interpreter is specifically specified (though it's a good idea as non-shells won't know how to execute your script ...

Read more

Is bash a shell script?

Bash is a Unix shell and command language written by Brian Fox for the GNU Project as a free software replacement for the Bourne shell. Bash can also read and execute commands from a file, called a shell script…

Read more

What is bash shell script?

  • Bash is a command line shell, and a Bash script is a set of instructions within the shell.

Read more

What is in shell script?

A shell script is a simple text file that contains commands in some shell language, e.g. bash, tcsh, python, matlab. Our focus is on Unix and AFNI commands using tcsh syntax (though the syntax used in this particular tutorial page could apply to either bash or tcsh).

Read more

How to check if a directory exists within a shell script?

  • What command can be used to check if a directory exists or not, within a Bash shell script? To check if a directory exists in a shell script, you can use the following: However, as Jon Ericson points out, subsequent commands may not work as intended if you do not take into account that a symbolic link to a directory will also pass this check.

Read more

How to check if a file exists in a shell script?

  • In the following I demonstrate several bash shell script examples for this use case. The easiest way to check if a file exists is to use the test command. With -f option, the test command returns true if the specified file exists.

Read more

Write a shell script which deletes all line containing the word unix in the filesn suppiled as argument to this shell script?

SS29

Script to delete all lines containing the word 'unix' from

files supplied as arguments

Usage: SS29 file1 file2 file3 ...

if [$# -lt 2] then echo Insufficient arguments exit fi for file do grep -v unix $file>/temp/$file cp /temp/$file $file done

Read more

How to check if a bash script is running as root?

  • In addition, with proper use of sudo, you could have the script check and see if it is running as root. If not, have it recall itself via sudo and then run with root permissions. Depending on what the script does, another option may be to set up a sudo entry for whatever specialized commands the script may need.

Read more