最近项目要用到达梦数据库，按照官方说明使用默认配置安装完成，最后启动时却报错。

# systemctl start DmServiceDMSERVER.service
Job for DmServiceDMSERVER.service failed because the control process exited with error code. See "systemctl status DmServiceDMSERVER.service" and "journalctl -xe" for details.

查看状态

# systemctl status DmServiceDMSERVER.service
● DmServiceDMSERVER.service - DM Instance Service(DmServiceDMSERVER).
   Loaded: loaded (/usr/lib/systemd/system/DmServiceDMSERVER.service; enabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2023-03-07 21:59:02 CST; 27s ago
  Process: 32099 ExecStart=/dm/bin/DmServiceDMSERVER start (code=exited, status=1/FAILURE)

Mar 07 21:58:47 instance-20230304-1756 systemd[1]: Starting DM Instance Service(DmServiceDMSERVER)....
Mar 07 21:59:02 instance-20230304-1756 DmServiceDMSERVER[32099]: [43B blob data]
Mar 07 21:59:02 instance-20230304-1756 systemd[1]: DmServiceDMSERVER.service: control process exited, code=...us=1
Mar 07 21:59:02 instance-20230304-1756 systemd[1]: Failed to start DM Instance Service(DmServiceDMSERVER)..
Mar 07 21:59:02 instance-20230304-1756 systemd[1]: Unit DmServiceDMSERVER.service entered failed state.
Mar 07 21:59:02 instance-20230304-1756 systemd[1]: DmServiceDMSERVER.service failed.

也没什么有效提示，网上也没搜到有效方法。考虑是否实例配置有问题，返回到创建实例的章节，发现这样一句话“执行初始化命令前，需要使用 root 用户授予 /dm/data 目录相应权限”。于是检查目录权限

# ls /dm/ -al
total 36
drwxr-xr-x. 17 dmdba dinstall  263 Mar  7 21:55 .
dr-xr-xr-x. 18 root  root      235 Mar  7 21:11 ..
drwxr-xr-x. 10 dmdba dinstall 8192 Mar  7 21:58 bin
drwxr-xr-x.  2 dmdba dinstall   30 Mar  7 21:21 bin2
drwxr-xr-x.  3 root  root       20 Mar  7 21:55 data
drwxr-xr-x.  3 dmdba dinstall   19 Mar  7 21:20 desktop
drwxr-xr-x.  2 dmdba dinstall 4096 Mar  7 21:21 doc
drwxr-xr-x. 14 dmdba dinstall  160 Mar  7 21:21 drivers
drwxr-xr-x.  2 dmdba dinstall 4096 Mar  7 21:21 include
drwxr-xr-x.  2 dmdba dinstall   94 Mar  7 21:21 jar
drwxr-xr-x.  7 dmdba dinstall  161 Mar  7 21:20 jdk
-rwxr-xr-x.  1 dmdba dinstall 1071 Mar  7 21:21 license_en.txt
-rwxr-xr-x.  1 dmdba dinstall 1146 Mar  7 21:21 license_zh.txt
drwxr-xr-x.  2 dmdba dinstall  198 Mar  7 21:58 log
drwxr-xr-x.  6 dmdba dinstall   92 Mar  7 21:21 samples
drwxr-xr-x.  3 dmdba dinstall   37 Mar  7 21:21 script
drwxr-xr-x.  9 dmdba dinstall 4096 Mar  7 21:21 tool
drwxr-xr-x.  3 dmdba dinstall   97 Mar  7 21:21 uninstall
-rwxr-xr-x.  1 dmdba dinstall 2208 Mar  7 21:21 uninstall.sh
drwxr-xr-x.  3 dmdba dinstall   88 Mar  7 21:21 web

果然data目录没有正确授权，于是

# chown dmdba:dinstall -R /dm/data
# chmod -R 755 /dm/data

再次开启数据库

# systemctl start DmServiceDMSERVER.service

查看数据库状态

# systemctl status DmServiceDMSERVER.service
● DmServiceDMSERVER.service - DM Instance Service(DmServiceDMSERVER).
   Loaded: loaded (/usr/lib/systemd/system/DmServiceDMSERVER.service; enabled; vendor preset: disabled)
   Active: active (running) since Tue 2023-03-07 22:50:36 CST; 59s ago
  Process: 32573 ExecStart=/dm8/bin/DmServiceDMSERVER start (code=exited, status=0/SUCCESS)
 Main PID: 32594 (dmserver)
   CGroup: /system.slice/DmServiceDMSERVER.service
           └─32594 /dm/bin/dmserver path=/dm8/data/DAMENG/dm.ini -noconsole

已经正常开启了