flock

Manage file locks to prevent concurrent execution of commands

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Lock file during command

flock

Lock a file and run a command exclusively$ flock /tmp/my.lock command_to_run

Create a lock file and execute a script with timeout$ flock -w 10 /var/lock/backup.lock ./backup.sh

Run multiple commands with shared lock to prevent parallel execution$ flock /tmp/db.lock bash -c 'command1 && command2'