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How to wait for one process to complete in a shell script?
It is a parameterized script. Unless you run a.sh with a ‘&’, it should wait for a.sh to complete to start b.sh. you may also give a sleep time after a.sh and b.sh just to be sure. Post your script snippet for better answers.
When to use the ” WAIT ” command in Bash?
The bash WAIT command is used to halt the execution of a script until all background jobs or specified JobID/PIDs terminate successfully and return an expected exit code to trigger the next command that was “waited for.” Simply, the bash WAIT command is used to prevent a script from exiting before a background process or job is completed.
How to pause bash script until previous commands are finished?
Use the fg builtin. It waits until background processes finish. Try help fg for details. If you insert something like the following code segment in between your two for loops, it might help. Of course, if your application Rscript has a chance of not completing successfully and lingering around, your second for loop may not have a chance to run.
Do you need to run a new command after the current one?
This is helpful: even if you forget that you need to run a new command after the current one, it’s no worry, since the new command will start automatically. Using a bash loop to monitor a JobID or process ID, you can set another command to run after the identified ID is finished.
When to use until loop in shell scripting?
In the above until loop syntax, until, do, and done are built-in keywords of the shell scripting. This loop will do the same task as other loops are doing and it is almost similar to the while loop but in such situations, we need to use only until loop as it will be a better way to do that task rather than doing with while loop.
When to execute a set of commands in the shell?
Sometimes you need to execute a set of commands until a condition is true. Here the Shell command is evaluated. If the resulting value is false, given statement (s) are executed. If the command is true then no statement will be executed and the program jumps to the next line after the done statement.