Bash Wait command in Linux

wait is a command that waits for the given jobs to complete and returns the exit status of the waited for command. Since the wait command affects the current shell execution environment, it is implemented as a built-in command in most shells.

1. What is the wait command in Linux?
2. What is the wait command in Unix?
3. How do I make bash script wait?
4. What is difference between wait and sleep command in Linux?
5. What is wait in bash?
6. How do you kill a command in Linux?
7. What does wait () do?
8. What is wait in OS?
9. How do I run a bash script?
10. How do I write a bash script in Linux?
11. Who command in Linux?
12. Why do we need to run sudo command?

What is the wait command in Linux?

wait is a built-in command of Linux that waits for completing any running process. wait command is used with a particular process id or job id. When multiple processes are running in the shell then only the process id of the last command will be known by the current shell.

What is the wait command in Unix?

In Unix shells, wait is a command which pauses until execution of a background process has ended.

How do I make bash script wait?

sleep is a command-line utility that allows you to suspends the calling process for a specified time. In other words, the sleep command pauses the execution of the next command for a given number of seconds.

What is difference between wait and sleep command in Linux?

wait waits for a process to finish; sleep sleeps for a certain amount of seconds. wait is a BASH built-in command. ... sleep is not a shell built-in command. It is a utility that delays for a specified amount of time.

What is wait in bash?

wait is a command that waits for the given jobs to complete and returns the exit status of the waited for command. Since the wait command affects the current shell execution environment, it is implemented as a built-in command in most shells. In this article, we'll explore the Bash built-in wait command.

How do you kill a command in Linux?

The syntax of the kill command takes the following form: kill [OPTIONS] [PID]... The kill command sends a signal to specified processes or process groups, causing them to act according to the signal.
...
kill Command

1. 1 ( HUP ) - Reload a process.
2. 9 ( KILL ) - Kill a process.
3. 15 ( TERM ) - Gracefully stop a process.

What does wait () do?

The wait() function will suspend execution of the calling thread until status information for one of its terminated child processes is available, or until delivery of a signal whose action is either to execute a signal-catching function or to terminate the process.

What is wait in OS?

In computer operating systems, a process (or task) may wait on another process to complete its execution. ... When the child process terminates, it returns an exit status to the operating system, which is then returned to the waiting parent process.

How do I run a bash script?

Make a Bash Script Executable

1. 1) Create a new text file with a . sh extension. ...
2. 2) Add #!/bin/bash to the top of it. This is necessary for the “make it executable” part.
3. 3) Add lines that you'd normally type at the command line. ...
4. 4) At the command line, run chmod u+x YourScriptFileName.sh. ...
5. 5) Run it whenever you need!

How do I write a bash 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 filename.sh.
5. For executing the script type bash filename.sh.

Who command in Linux?

The standard Unix command who displays a list of users who are currently logged into the computer. The who command is related to the command w , which provides the same information but also displays additional data and statistics.

Why do we need to run sudo command?

The sudo command allows you to run programs with the security privileges of another user (by default, as the superuser). ... Using the sudoers file, system administrators can give certain users or groups access to some or all commands without those users having to know the root password.