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.

1. How do you delay a command in Linux?
2. What does WAIT command do in shell script?
3. What is difference between wait and sleep command in Linux?
4. How do you delay a command?
5. Who command in Linux?
6. How do I run a shell script?
7. How do I wait in Terminal?
8. What is && in shell script?
9. How do you delay a shell script?
10. What does sleep do in Linux?
11. What is difference between sleep and wait?
12. What is wait in bash script?

How do you delay a command in Linux?

/bin/sleep is Linux or Unix command to delay for a specified amount of time. You can suspend the calling shell script for a specified time. For example, pause for 10 seconds or stop execution for 2 mintues. In other words, the sleep command pauses the execution on the next shell command for a given time.

What does WAIT command do in shell script?

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

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.

How do you delay a command?

Type in your command.

1. PAUSE — Type pause into the line. You don't need to add anything else here.
2. TIMEOUT — Type timeout time where "time" is replaced by the number of seconds to delay. ...
3. PING — Type in ping address where "address" is the IP address for a computer or website you want to PING.

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.

How do I run a shell script?

Steps to write and execute a script

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>.

How do I wait in Terminal?

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.

What is && in shell script?

Logical AND operator(&&):

The second command will only execute if the first command has executed successfully i.e, its exit status is zero. This operator can be used to check if the first command has been successfully executed. This is one of the most used commands in the command line. Syntax: command1 && command2.

How do you delay a shell script?

Sleep command is used to delay for a fixed amount of time during the execution of any script. When the coder needs to pause the execution of any command for the particular purpose then this command is used with the particular time value. You can set the delay amount by seconds (s), minutes (m), hours (h) and days (d).

What does sleep do in Linux?

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 sleep and wait?

The major difference is that wait() releases the lock or monitor while sleep() doesn't releases the lock or monitor while waiting. wait() is used for inter-thread communication while sleep() is used to introduce pause on execution, generally. Thread. ... If another thread calls t.

What is wait in bash script?

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.