Fuser

fuser identify processes using files or sockets

fuser access.log
/path/to/access.log: 16602 16833 16834 16835 16836

See also

• file, File system, directory, touch, mkdir, ls, ln truncate, fallocate, split, stat, inode, File descriptor, superblock, block size (blockdev), fuser, lsof, scrub, chattr, ulimit (nofiles), cp, mv, file (command), mkfifo, chmod

http://man7.org/linux/man-pages/man1/fuser.1.html