[yz@localhost ~]$ lsof -u yz
COMMAND    PID USER   FD      TYPE             DEVICE  SIZE/OFF      NODE NAME
sshd      2805   yz  cwd   unknown                                        /proc/2805/cwd (readlink: Permission denied)
sshd      2805   yz  rtd   unknown                                        /proc/2805/root (readlink: Permission denied)
sshd      2805   yz  txt   unknown                                        /proc/2805/exe (readlink: Permission denied)
sshd      2805   yz NOFD                                                  /proc/2805/fd (opendir: Permission denied)