mpd 编译安装完用不了

环境

Ubuntu 18.04 ，其实用得是 Linux Mint 19.3

背景

apt install mpd 自带的 mpd 版本较低，故编译安装。

步骤

按照 https://www.musicpd.org/doc/html/user.html 中 Compiling from source¶安装 详细安装日志烦请移步： https://pastebin.com/mG60p8q8 这里有一点比较有意思，就是最后一步ninja -C output/release install，前面不加 sudo 过不去。

问题表现

安装完后 mpd 报错找不到配置文件，

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [13:47:14] 
$ sudo mpd
exception: No configuration file found

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [13:47:19] C:1
$ mpd
exception: No configuration file found

需要 touch 创建 /etc/mpd.conf，然后指定配置文件运行，是不是前面步骤没做好？（问题一）

明明没有运行 mpd，但是还提示 Address already in use，这是啥原因？（问题二）

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:23] 
$ netstat -antlp | grep mpd
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:28] C:1
$ netstat -antlp | grep 6600
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:52] C:1
$ mpd /etc/mpd.conf         
exception: bind to '0.0.0.0:6600' failed (continuing anyway, because binding to '[::]:6600' succeeded): Failed to bind socket: Address already in use
output: No 'audio_output' defined in config file
output: Successfully detected a sndio audio device

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:13:58] 
$ netstat -antlp | grep 6600
(Not all processes could be identified, non-owned process info
 will not be shown, you would have to be root to see it all.)
tcp6       0      0 :::6600                 :::*                    LISTEN      32660/mpd           

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:14:19] 
$ ps -ef | grep mpd         
mint64   32660  3068  0 14:13 ?        00:00:00 mpd /etc/mpd.conf
mint64   32703  3668  0 14:14 pts/0    00:00:00 grep --color=auto --exclude-dir=.bzr --exclude-dir=CVS --exclude-dir=.git --exclude-dir=.hg --exclude-dir=.svn --exclude-dir=.idea --exclude-dir=.tox mpd

服务都没装上的吗，看之前提示是装到 /usr/local/lib/systemd/system 了，这个怎么运行呐。（问题三）

# mint64 @ mint64-VirtualBox in ~/mpd-0.22.6 [14:18:13] C:4
$ systemctl status mpd.service
Unit mpd.service could not be found.

闲言碎语

为了用 Linux，我最近感觉又有了年轻时的激情，但是总是遇到问题，啥时候才能配置好 i3wm 。