[root@pcidata-jenkins ansible_playbooks]# ps aux|grep rsync
root 1799 0.0 0.0 114652 480 ? Ss Jun29 0:00 rsync --daemon
root 61754 0.0 0.0 112664 972 pts/2 S+ 11:17 0:00 grep --color=auto rsync
[root@pcidata-jenkins ansible_playbooks]# kill -9 1799
You have new mail in /var/spool/mail/root
[root@pcidata-jenkins ansible_playbooks]# rsync --daemon
failed to create pid file /var/run/rsyncd.pid: File exists
[root@pcidata-jenkins ansible_playbooks]# ps aux|grep rsync
root 61790 0.0 0.0 112660 968 pts/2 S+ 11:18 0:00 grep --color=auto rsync
[root@pcidata-jenkins ansible_playbooks]# rsync --daemon
failed to create pid file /var/run/rsyncd.pid: File exists
#删除 /var/run/rsyncd.pid即可
[root@pcidata-jenkins ansible_playbooks]# rm -fr /var/run/rsyncd.pid
[root@pcidata-jenkins ansible_playbooks]# rsync --daemon
failed to create pid file /var/run/rsyncd.pid: File exists报错
原文：https://www.cnblogs.com/Dev0ps/p/9293530.html