Homebrew install mtr 问题

[KokongW]

遇到了一个错误，由于自己也不是很懂，发上来问问V友们！

$ brew install mtr
Warning: A newer Command Line Tools release is available
The standalone package can be obtained from
https://developer.apple.com/downloads/,
or it can be installed via Xcode's preferences.
==> Downloading ftp://ftp.bitwizard.nl/mtr/mtr-0.85.tar.gz
Already downloaded: /Library/Caches/Homebrew/mtr-0.85.tar.gz
==> Downloading https://github.com/traviscross/mtr/commit/edd425.diff
Already downloaded: /Library/Caches/Homebrew/mtr--patch-c1ed669cdf65d607f75abc729a333b180ee42343.diff
==> Patching
patching file asn.c
patching file curses.c
patching file display.c
patching file dns.c
patching file getopt.c
patching file getopt1.c
patching file gtk.c
patching file mtr.c
patching file net.c
patching file raw.c
patching file report.c
patching file select.c
patching file split.c
==> ./configure --prefix=/usr/local/Cellar/mtr/0.85 --without-gtk --without-glib
==> make install
==> Caveats
mtr requires superuser privileges. You can either run the program
via `sudo`, or change its ownership to root and set the setuid bit:

sudo chown root:wheel /usr/local/Cellar/mtr/0.85/sbin/mtr
sudo chmod u+s /usr/local/Cellar/mtr/0.85/sbin/mtr

In any case, you should be certain that you trust the software you
are executing with elevated privileges.
==> Summary
? /usr/local/Cellar/mtr/0.85: 8 files, 160K, built in 22 seconds

[jakwings]

这不是错误，只是善意的提示。第一条提示是说苹果开发者官网提供了一个命令行工具包（包含 llvm 啥的）。可以不管它。

第二次提示：要运行 mtr 需要 root 权限，假如你不想每次都用 sudo 输入密码再运行，可以执行它提供的那两条命令来为那个程序添加 set_uid 属性，在运行时临时借用 root 的权限而无需输入密码。

[KokongW]

@jakwings 但似乎的确是安装失败了：
mtr: command not found

[blacktulip]

@KokongW

看提示
mtr requires superuser privileges. You can either run the program
via `sudo`, or change its ownership to root and set the setuid bit:

你自己不是贴了嘛

用 sudo

[blacktulip]

或者你用 sudo /usr/local/Cellar/mtr/0.85/sbin/mtr 试试，还是不行就是路径没设好

[jakwings]

@KokongW hash -r 刷新一下程序位置绑定信息？

[chen7897499]

输入brew doctor
然后加权限sudo chown root:wheel /usr/local/Cellar/mtr/0.85/sbin/mtr
sudo chmod u+s /usr/local/Cellar/mtr/0.85/sbin/mtr
然后再mtr

[KokongW]

@chen7897499 -bash: mtr: command not found

还是一样呢。

[KokongW]

@blacktulip 还是不行

[KokongW]

@jakwings 还是依旧

[jakwings]

@KokongW 将下面这句添加到 ~/.bashrc 的最后，然后重新运行 bash 。
PATH="/usr/local/Cellar/mtr/0.85/sbin:$PATH"

[nodejx]

ls -al `which mtr`
lrwxr-xr-x 1 teacher admin 35 Jan 17 21:28 /usr/local/bin/mtr -> /usr/local/Cellar/mtr/0.85/sbin/mtr

[KokongW]

@jakwings vim ~/.bashrc 看到里面是空白的，需要新建文件。路径在那儿？

重新运行bash怎么做？

小弟不太懂，烦请指点。

[jakwings]

@KokongW 好吧，我只解释最后一次了，然后你得自己去查 Unix/Linux 系统的入门资料了。要完全解释很花时间。

不修改 ~/.bashrc 了，直接 vim ~/.bash_profile ，在文件末尾添加 10 楼那句命令，保存。
然后不用重启 bash ，直接执行 source ~/.bash_profile ; hash -r

~ 是 $HOME 的简写，bash 会自动扩展成 $HOME 的内容。echo $HOME 就可以知道是哪个文件夹了，就是用户文件夹的根目录。

[runcelim]

sudo ln -s /usr/local/Cellar/mtr/0.85/sbin/mtr /usr/local/bin

[meteor]

echo 'export PATH="/usr/local/sbin:$PATH"' >> ~/.bash_profile
我是看到brew doctor报这个waring, 加上就好了.