Contents
How do you keep a shell script sleeping?
/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.
How do I lock a shell script?
One common way to lock a file on a Linux system is flock . The flock command can be used from the command line or within a shell script to obtain a lock on a file and will create the lock file if it doesn’t already exist, assuming the user has the appropriate permissions.
What is sleep in shell script?
sleep is a command-line utility that allows you to suspends the calling process for a specified time. The sleep command is useful when used within a bash shell script, for example, when retrying a failed operation or inside a loop.
What are the following methods can be used to execute the shell script?
3. Execute Shell Script Using . ./ (dot space dot slash) While executing the shell script using “dot space dot slash”, as shown below, it will execute the script in the current shell without forking a sub shell.
What is lock in shell script?
A basic lock file is when you create a file to be used as a lock. The existence of the file will be a signal to any subsequent instance of the script not to run. When the script exits, you delete the file. The next instance of the script will check for the existence of the file to determine if it is safe to execute.
Is it possible to sleep in a shell script?
If you use a shell script to check on the process continuously in a loop, there is a very high chance that the script will introduce a slight increase in the CPU load. If you include the sleep command within the loop the CPU increase will most probably be negligible.
How to use while loop and sleep in Linux?
Second, I pause the program by calling the Unix/Linux sleep command from my Bourne shell script. As an example of both a while loop and sleep command, here is how my Email Agent program is now run from inside a Bourne shell script:
Is it safe to kill sleep processes in Bash?
Again, this is limiting itself to only sleep processes running directly under that one Bash session. As long as the PID was logged correctly, this makes it a lot safer than killall sleep or pkill sleep, which could nuke any sleep process on the system (permissions allowing).
Are there any switches for the sleep command?
There are only a couple of switches available for sleep command. One of them is –help which points to the help file of sleep command. The other one is –version which gives the attributes like, version number, details of copyright, authors and the licenses.