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Today I had the problem that I couldn't delete a folder because "it was busy".
How can I find out which application to blame for that or can I just delete it with brute force?
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lsof can help to see the list of file. here is way to see the locked files. Show activity on this post. in case lsof itself is missing on the system, ls /proc/*/fd/* | grep LOCK_FILE_NAME should provide the same information.
Lock files should be stored within the /var/lock directory structure. Lock files for devices and other resources shared by multiple applications, such as the serial device lock files that were originally found in either /usr/spool/locks or /usr/spool/uucp , must now be stored in /var/lock .
File locking is a mechanism to restrict access to a file among multiple processes. It allows only one process to access the file in a specific time, thus avoiding the interceding update problem.
lslocks lists information about all the currently held file locks in a Linux system. (part of util-linux) this utility has support for json output, which is nice for scripts.
~$ sudo lslocks
COMMAND PID TYPE SIZE MODE M START END PATH
cron 873 FLOCK 4B WRITE 0 0 0 /run/crond.pid
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