一、前文

TDengine 入门教程——导读

二、下载安装

再rpm安装，sudo rpm -ivh TDengine-server-<version>-Linux-x64.rpm
安装的时候，会跳出两个提示
- Enter FQDN:port，第一次安装，这个地方一定要直接回车跳过！
- Enter your email address，这个随意。

sudo rpm -ivh TDengine-server-3.0.0.1-Linux-x64.rpm

sudo rpm -ivh taosTools-2.1.2-Linux-x64.rpm

[root@iZ2ze30dygwd6yh7gu6lskZ ~]# sudo rpm -ivh TDengine-server-3.0.0.1-Linux-x64.rpm
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:tdengine-3.0.0.1-3               ################################# [100%]
Start to install TDengine...

System hostname is: iZ2ze30dygwd6yh7gu6lskZ

Enter FQDN:port (like h1.taosdata.com:6030) of an existing TDengine cluster node to join
OR leave it blank to build one:

Enter your email address for priority support or enter empty to skip: 
Created symlink /etc/systemd/system/multi-user.target.wants/taosd.service → /etc/systemd/system/taosd.service.

To configure TDengine : edit /etc/taos/taos.cfg
To start TDengine     : sudo systemctl start taosd
To access TDengine    : taos -h iZ2ze30dygwd6yh7gu6lskZ to login into TDengine server


TDengine is installed successfully!

三、启动taosd

systemctl start taosd
systemctl stop taosd
systemctl restart taosd

四、查看状态

systemctl status taosd

[root@iZ2ze30dygwd6yh7gu6lskZ ~]# systemctl status taosd
● taosd.service - TDengine server service
   Loaded: loaded (/etc/systemd/system/taosd.service; enabled; vendor preset: disabled)
   Active: inactive (dead)
[root@iZ2ze30dygwd6yh7gu6lskZ ~]# systemctl start taosd
[root@iZ2ze30dygwd6yh7gu6lskZ ~]# systemctl status taosd
● taosd.service - TDengine server service
   Loaded: loaded (/etc/systemd/system/taosd.service; enabled; vendor preset: disabled)
   Active: active (running) since Wed 2022-09-07 09:45:11 CST; 4s ago
  Process: 14004 ExecStartPre=/usr/local/taos/bin/startPre.sh (code=exited, status=0/SUCCESS)
 Main PID: 14010 (taosd)
    Tasks: 21 (limit: 26213)
   Memory: 6.9M
   CGroup: /system.slice/taosd.service
           ├─14010 /usr/bin/taosd
           └─14017 /usr/bin/udfd -c /etc/taos

Sep 07 09:45:11 iZ2ze30dygwd6yh7gu6lskZ systemd[1]: Starting TDengine server service...
Sep 07 09:45:11 iZ2ze30dygwd6yh7gu6lskZ systemd[1]: Started TDengine server service.

五、命令行（CLI）

taos

[root@iZ2ze30dygwd6yh7gu6lskZ ~]# taos
Welcome to the TDengine Command Line Interface, Client Version:3.0.0.1
Copyright (c) 2022 by TDengine, all rights reserved.

Server is Community Edition.

taos> exit

六、修改root密码

刚安装好的TDengine是没有密码的，直接taos就能进入命令行（CLI）
然后修改root账户的密码，alter user root pass '123456';
具体查看：TDengine 入门教程④——权限管理 | 用户增删改查，授权与撤销授权

[root@VM-0-3-centos ~]# taos
Welcome to the TDengine Command Line Interface, Client Version:3.0.2.0
Copyright (c) 2022 by TDengine, all rights reserved.

   ******************************  Tab Completion  **********************************
   *   The TDengine CLI supports tab completion for a variety of items,             *
   *   including database names, table names, function names and keywords.          *
   *   The full list of shortcut keys is as follows:                                *
   *    [ TAB ]        ......  complete the current word                            *
   *                   ......  if used on a blank line, display all valid commands  *
   *    [ Ctrl + A ]   ......  move cursor to the st[A]rt of the line               *
   *    [ Ctrl + E ]   ......  move cursor to the [E]nd of the line                 *
   *    [ Ctrl + W ]   ......  move cursor to the middle of the line                *
   *    [ Ctrl + L ]   ......  clear the entire screen                              *
   *    [ Ctrl + K ]   ......  clear the screen after the cursor                    *
   *    [ Ctrl + U ]   ......  clear the screen before the cursor                   *
   **********************************************************************************

Server is Community Edition.

taos> show users;
           name           | super | enable | sysinfo |       create_time       |
================================================================================
 root                     |     1 |      1 |       1 | 2022-12-14 17:09:19.213 |
Query OK, 1 row(s) in set (0.001346s)

taos> alter user root pass '123456';
Query OK, 0 row(s) affected (0.001140s)

taos> exit

修改root密码后，taos就不能直接进入命令行（CLI）了
必须 taos -p，然后输入密码

[root@VM-0-3-centos ~]# taos
Welcome to the TDengine Command Line Interface, Client Version:3.0.2.0
Copyright (c) 2022 by TDengine, all rights reserved.

failed to connect to server, reason: Authentication failure