---session env check---
SHELL=/bin/bash
PWD=/workspace
LOGNAME=root
XDG_SESSION_TYPE=tty
MOTD_SHOWN=pam
HOME=/root
LANG=C.UTF-8
SSH_CONNECTION=172.30.0.1 52588 172.30.1.168 22
XDG_SESSION_CLASS=user
USER=root
SHLVL=1
XDG_SESSION_ID=453
XDG_RUNTIME_DIR=/run/user/0
SSH_CLIENT=172.30.0.1 52588 22
LC_ALL=C.UTF-8
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/0/bus
_=/usr/bin/env
OLDPWD=/root