pg_ctl start [-w] [-s] [-D datadir] [-l filename] [-o options] [-p path]

pg_ctl stop [-W] [-s] [-D datadir] [-m s[mart] | f[ast] | i[mmediate] ]

pg_ctl restart [-w] [-s] [-D datadir] [-m s[mart] | f[ast] | i[mmediate] ] [-o options]

pg_ctl reload [-s] [-D datadir]

pg_ctl status [-D datadir]

pg_ctl kill [signal_name] [process_id]

pg_ctl register [-N servicename] [-U username] [-P password] [-D datadir] [-w] [-o options]

pg_ctl unregister [-N servicename]

# 查找 pg_ctl

[root@localhost ~]# whereis pg_ctl

pg_ctl: /usr/bin/pg_ctl /usr/share/man/man1/pg_ctl.1.gz

# 启动 postgres

[root@localhost ~]# su postgres

bash-4.2$ /usr/bin/pg_ctl -D /var/lib/pgsql/data start

could not change directory to "/root"

pg_ctl: another server might be running; trying to start server anyway

server starting

bash-4.2$ FATAL:  lock file "postmaster.pid" already exists

HINT:  Is another postmaster (PID 30063) running in data directory "/var/lib/pgsql/data"?

bash-4.2$ cd /usr/bin

bash-4.2$ pwd

/usr/bin

bash-4.2$ ./pg_ctl -D /var/lib/pgsql/data start

server starting