If the shell script is readable and executable then to execute it just type the name of the shell script file. Otherwise, you can explicity call a shell interpreter to run the file as a shell script, i.e.,

ksh myfile

No, the shell needs both execute and read permissions to run the script.

You don't need a shell script for that; use either 'whoami' or 'id'

The 'exit' command allows you to stop a running shell script at any point and to return a "status" value back to whomever called the shell script. This is a very common practice with shell scripts; sometimes you want to stop the script before it gets to the end of the shell script (for various logic reasons).

The 'exit' command also allows you to give a status that any other calling process can use to determine if the shell script ended successfully or not.

Shell scripts are not compiled; they are interpreted (and therefore do not need to be compiled). Just type in the name of the shell script and any parameters it needs to execute.

You don't need a shell script to do this - just use the 'tail' command.

With the # symbol.

A .sh file is a shell script.

A shell function will do nothing unless it is explicitly called by other code, typically in a shell script. A shell script is a runnable, executable process, which can call other shell scripts and/or functions.

The question might be worded backwards - it is necessary to write shell functions for shell scripts when certain logical functionality is required to be performed multiple times. Consider a shell function equivalent to a program subroutine - they operate the same way.

To do this you will need at least read permission; if you don't have that then you will not be able to execute the script at all.

One way is to copy the script to your directory and add the execute permission.

The second way is to call the correct shell interpreter program directly, as in:

ksh /some/file/shell

A shell script is nothing more than a readable and executable ASCII text file. In this file you put all of the commands that you want to execute, in sequence. The name of the file can be anything you like.

Any text editor (VI, VIM, pico, etc) can create a shell script file

In addition, shell script files have the ability to detect logic, and are programmable. Just think about what tasks you want to perform and their order, and put it into a file, and there you have a shell script.

You don't need a shell script to do that. Since you don't say what 10 shell variables you want, you can list them all by using the 'set' command to list all known in-use shell variables in the current session.

The special line at the beginning of the script is only necessary if you want the script to be run by a certain command interpreter that is different from your logon shell or because you don't know what environment the user of the shell might be running in.

It is a special comment line that looks like:

#!/command-name

such as:

#!/usr/bin/ksh

which causes the ksh interpreter to be used for the rest of the shell script.

write ashell script to add awo matrix using array.

Well the question is not particularly specific. I assume that we are talking about shell and in this example I would refer to "bash" shell.

#!/bin/bash

echo $1

this simple script will print first parameter passed to it.

You don't need a shell script to do this; use the 'grep' command with the '-c' option to count the number of occurrences of some pattern.

Yes

Actually, just about anything you want to do. Depends on the job function requirements.

"Shell Script is series of command written in plain text file. Shell script is just like batch file in MS-DOS but have more power than the MS-DOS batch file."

The shell interprets the script, while the C-compiler generates a binary executable.

We can not perform Shell Scripting in DOS, we can do Batch programing in DOS..

As long as the script file is readable and executable, just type the name of the script and it will execute immediately.

Otherwise, you can call the shell interpreter and have it run it immediately such as:

bash ./thefile

where ./thefile is the script you want to run. Or, substitute the shell interpreter you wish to use instead of bash, such as sh, ksh, tcsh, csh, etc.

If you are asking about a shell script, just create a text file with the commands you want to execute inside it. Then, make the file executable and readable and you have a shell script file.

A shell program is more complicated; you need to support the user features that most users would expect a shell program or shell interpreter to do. I would suggest studying the source code of a current shell program to see how to go about implementing one of your own.

use python, shell is stupid

#!/bin/sh

PS -a

Use the builtin 'echo' or 'print' command followed by the shell variable name, which will substitute the value when printed/displayed.

The last line of a Bash shell script for loop typically closes the loop with the done keyword. For example:

for i in {1..5}; do
  echo "Number $i"
done

Here, done signifies the end of the for loop.

Check below link

The local user files that are read are the .login and the .cshrc files

You will have to be more specific about what you intend to do. In general, a shell script by itself does not read file information and then do something with it. There may be calls to other scripting languages such as awk, perl, python, etc., that will actually read the information and process the data.

You don't need a shell script for this; just use the 'id' command look at the uid, which for root is 0.

That would depend on what shell you're using. Most seem to have a command similar to "echo x" which will print x to the terminal.

Your question is unclear; Are you talking about reading a filename that happens to contain PDF, or reading a PDF file itself?

The shell script doesn't know or care what kind of files you are using. It all depends on what you intend to do with the file.

A shell script is used to automatically enter a series of commands without having to make the user type them out.

Linux shell scripting tutorials are available as pdf files or videos where a lecturer speaks over a video of a computer console. This is where you can watch someone code in the bash environment and follow along.

A shell script starts with the definition of the interpreter to use. Usually when one says ``shell script'', one means bash script. So a good first line would be #!/bin/bash This says that the program located in the filesystem at /bin/bash should be executed with this script as its input. With a bash script, you can simply start typing a list of commands. Furthermore it is possible to use logic and control structures like if, else, for, while, etc etc. See http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html for a good starting guide.

A shell script is not necessary for this solution. See related link for answer.

The trap command is used in a shell script to intercept certain types of software signals; usually it is used to do a "graceful" cleanup when the shell program is interrupted.

To change permissions on a shell script, you can use the chmod command in the terminal. For example, to make a script executable, you would run chmod +x script.sh. You can also set specific permissions by using numeric values, such as chmod 755 script.sh, which grants read, write, and execute permissions to the owner and read and execute permissions to the group and others.

seq 1 2 99

for i in *.c
do
mv $i $i.old
done

You wouldn't use a shell script to do this. Any program could listen on a port by connecting or binding to a socket address. There are some utility languages such as Perl that could connect to a port and listen, but the listening would also be a function of what you are listening for.

You don't need a script, just use the 'wc' command:

# Lines

wc -l <file>

# Words

wc -w <file>

For any Unix or Linux based operating system, make the text file readable and executable and then invoke (call) it by the file name, which will execute the script.

In "bash" shell it can be achieved with command "read"

#!/bin/bash

echo "Hi There, what is your name?"

read name

echo $name

The echo command echoes out any of the command line arguments given to it. It is commonly used in shell scripts to echo what portions of the shell script are doing.

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

Linux shell is a programming language. its fully different from others progrmming language.

the script which is used in Linux quite tough to remember if we comparison to other programming laguages.