搭建环境debian10和ubuntu20，节点类型vless+tls，安装过程无错误提示，也提示安装成功，但就是无法使用该节点正常翻墙。

ssh登录vps后使用systemctl status xray查看xray运行状态，发现xray并未正常启动运行，以下是大致显示的内容：

systemctl status xray

● xray.service - Xray Service
     Loaded: loaded (/etc/systemd/system/xray.service; enabled; vendor preset: enabled)
    Drop-In: /etc/systemd/system/xray.service.d
             └─10-donot_touch_single_conf.conf
     Active: failed (Result: exit-code) since ----时间-------ago
       Docs: https://github.com/xtls
    Process: 9876 ExecStart=/usr/local/bin/xray run -config /usr/local/etc/xray/config.json (code=exited, status=23)
   Main PID: 9876 (code=exited, status=23)

----时间------- vpsname  systemd[1]: Started Xray Service.
----时间------- vpsname xray[9876]: Xray 1.5.5 (Xray, Penetrates Everything.) Custom (go1.18.1 linux/amd64)
----时间------- vpsname xray[9876]: A unified platform for anti-censorship.
----时间------- vpsname xray[9876]: ----时间------- [Info] infra/conf/serial: Reading config: /usr/local/etc/xray/config.json
----时间------- vpsname xray[9876]: Failed to start: main: failed to load config files: [/usr/local/etc/xray/config.json] > invalid UUID:
----时间------- vpsname systemd[1]: xray.service: Main process exited, code=exited, status=23/n/a
----时间------- vpsname systemd[1]: xray.service: Failed with result 'exit-code'.

经排查，可能的原因是由于sudo命令执行异常引起的。因为在命令行中输入sudo命令会出现如下非正常提示unable to resolve host vpsname: Name or service not known。（假设主机名是vpsname，vps主机名可使用hostname命令查看）

root@vpsname:~# sudo
sudo: unable to resolve host vpsname: Name or service not known
usage: sudo -h | -K | -k | -V
usage: sudo -v [-AknS] [-g group] [-h host] [-p prompt] [-u user]
usage: sudo -l [-AknS] [-g group] [-h host] [-p prompt] [-U user] [-u user] [command]
usage: sudo [-AbEHknPS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p prompt] [-T timeout] [-u user] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p prompt] [-T timeout] [-u user] file ...

根据网上找到的解决方案，使用编辑命令修改/etc/hosts

root@vpsname:~# vim /etc/hosts

127.0.0.1       localhost
127.0.1.1       ubuntu
127.0.0.1       vpsname

前两行是原有内容，第三行为添加内容。保存退出后，再执行sudo命令，错误提示消失。

root@vpsname:~# sudo
usage: sudo -h | -K | -k | -V
usage: sudo -v [-AknS] [-g group] [-h host] [-p prompt] [-u user]
usage: sudo -l [-AknS] [-g group] [-h host] [-p prompt] [-U user] [-u user] [command]
usage: sudo [-AbEHknPS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p prompt] [-T timeout] [-u user] [VAR=value] [-i|-s] [<command>]
usage: sudo -e [-AknS] [-r role] [-t type] [-C num] [-g group] [-h host] [-p prompt] [-T timeout] [-u user] file ...

再使用ProxySu安装vless+tls节点后，能正常翻墙了。

宇明固定域名 http://yuming.qxbbs.org