话不多说，直接上解决办法

/home/staragent/bin/agent.sh restart

查看为什么使用这条命令

# aol2目录为空
[root@VM-12-11-centos ~]# cd /home/aol2/
[root@VM-12-11-centos aol2]# ls -a
.  ..# staragent目录不为空
[root@VM-12-11-centos aol2]# cd /home/staragent/
[root@VM-12-11-centos staragent]# ls
bin  BUILD  conf  data  libexec  LICENSE  log  plugins# 进入bin文件，能看到客户端启动命令：agent.sh
[root@VM-12-11-centos staragent]# cd bin/
[root@VM-12-11-centos bin]# ls
agent_env.sh  agent.sh  agent_start_cmd.txt  dnsresolver  pluginctl  pluginplatform  post_install.sh  sa_healthCheck.sh  sa_recovery.sh  staragent2  staragentctl  staragentd  unzip

为什么知道上述的为启动命令？

我们来看一下安装时候的命令

[root@VM-12-11-centos ~]# bash  <(curl http://agent-install-default.oss-cn-hangzhou.aliyuncs.com/production-install.sh) 'http://devops.aliyuncs.com/api/getSnByRegion?regionId=22d12fc3-f568-454e-ae80-5e94cd995a55&sign=33OZp7jtB%2FeGCjAm0fiuRg%3D%3D&aliyunRegion=default&timestamp=1644562859161' http://agent-install-default.oss-cn-hangzhou.aliyuncs.com/production-agent.tgz http://devops.aliyuncs.com/api/verifySnAndRegionId?sign=gLpoHYSXOjATzFMG35j%2Fag%3D%3D 22d12fc3-f568-454e-ae80-5e94cd995a55 1644562859161 default% Total    % Received % Xferd  Average Speed   Time    Time     Time  CurrentDload  Upload   Total   Spent    Left  Speed
100  5125  100  5125    0     0  30235      0 --:--:-- --:--:-- --:--:-- 30325
检查目录
目录/home/aol2或者/home/staragent已经存在于您的机器上，有可能是因为您已经安装过RDC的Agent，继续安装，会重置这些目录中的内容。请选择[Y/n]:Y
检查python
检查wget
检查zlib-dev openssl-devel bzip2-devel包是否缺失
启用本机已存在SN:7f9cdc5a-f876-40fa-a9a9-b9a2184b41d1
下载并安装Agent
--2022-02-11 14:46:11--  http://agent-install-default.oss-cn-hangzhou.aliyuncs.com/production-agent.tgz
Resolving agent-install-default.oss-cn-hangzhou.aliyuncs.com (agent-install-default.oss-cn-hangzhou.aliyuncs.com)... 183.131.227.249
Connecting to agent-install-default.oss-cn-hangzhou.aliyuncs.com (agent-install-default.oss-cn-hangzhou.aliyuncs.com)|183.131.227.249|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 65573216 (63M) [application/octet-stream]
Saving to: ‘/tmp/agent.tgz’100%[======================================================================================================================================================================>] 65,573,216  11.7MB/s   in 4.4s2022-02-11 14:46:15 (14.3 MB/s) - ‘/tmp/agent.tgz’ saved [65573216/65573216]/home/staragent/bin/agent.sh
Stopping staragentd:  Agent not running.Agent not running.
stop staragent finish
unzip agent...
finished unzip agent
启动Agent。
/home/staragent/bin/agent.sh
Stopping staragentd:  Agent not running.Agent not running.
stop staragent finish
Starting staragentd: 安装成功

提示说已经安装过

/home/aol2或者/home/staragent已经存在于您的机器上

那么安装的文件应该在其中一个文件夹中， 这就有了我们去查看这两个文件夹

启动Agent。
/home/staragent/bin/agent.sh

可以看到启动客户端的命令文件位置

#输入启动命令，提示我们使用 start 或者 restart
[root@VM-12-11-centos bin]# /home/staragent/bin/agent.sh
/home/staragent/bin/agent.sh start or /stop or restart

然后得到最上面的命令，启动客户端命令

/home/staragent/bin/agent.sh restart