Fuser

lastmod 2026-02-04created 2026-02-046 edits

Find the processes using a specific file/port

Simple Usage

# 이 파일을 사용 중인 PID 확인 / Which PIDs use this file
fuser /var/log/syslog

# 이 포트를 사용 중인 프로세스 / Which process uses this port
fuser 8080/tcp

See also

• lsof
• strace
• inotifywait - Watch a specific file/directory
• bpftrace/bcc - Minimal overhead, suitable for production environments
• auditd - System-level audit logs (can be configured persistently)