问题描述
我需要通过 Puppet、虚拟终端或 ssh 自动配置桌面。
不幸的是，通过 ssh 或虚拟终端调用 gsettings 给出：
gsettings set org.compiz.core:/org/compiz/profiles/unity/plugins/core/ hsize "4"
(process:29520): dconf-WARNING **: failed to commit changes to dconf: Cannot autolaunch D-Bus without X11 $DISPLAY
当我用 export DISPLAY=:0.0 设置 $DISPLAY 时，它给出了另一个错误：
(process:29862): dconf-WARNING **: failed to commit changes to dconf: Could not connect: Connection refused
我能做些什么？
最佳方法
关键是设置DBUS_SESSION_BUS_ADDRESS环境变量。
在 this thread 上，我找到了以下脚本，它有助于获取该变量的正确值。它需要在桌面上运行的进程的名称，我们要在其上更改 dbus 设置。 (可以有超过 1 个并行运行的图形会话)。让我们称之为 discover_session_bus_address.sh
#!/bin/bash
# Remember to run this script using the command "source ./filename.sh"
# Search these processes for the session variable
# (they are run as the current user and have the DBUS session variable set)
compatiblePrograms=( nautilus kdeinit kded4 pulseaudio trackerd )
# Attempt to get a program pid
for index in ${compatiblePrograms[@]}; do
PID=$(pidof -s ${index})
if [[ "${PID}" != "" ]]; then
break
fi
done
if [[ "${PID}" == "" ]]; then
echo "Could not detect active login session"
return 1
fi
QUERY_ENVIRON="$(tr '\0' '\n' < /proc/${PID}/environ | grep "DBUS_SESSION_BUS_ADDRESS" | cut -d "=" -f 2-)"
if [[ "${QUERY_ENVIRON}" != "" ]]; then
export DBUS_SESSION_BUS_ADDRESS="${QUERY_ENVIRON}"
echo "Connected to session:"
echo "DBUS_SESSION_BUS_ADDRESS=${DBUS_SESSION_BUS_ADDRESS}"
else
echo "Could not find dbus session ID in user environment."
return 1
fi
return 0
使用此脚本，我们可以执行以下操作，假设 unity 进程正在桌面上运行，我们要在其上应用我们的设置：
. ./discover_session_bus_address.sh unity
gsettings set org.compiz.core:/org/compiz/profiles/unity/plugins/core/ hsize "4"
一切正常。