每次断开 SSH 连接时，我都必须重新安装每个程序。有人能解释一下我做错了什么吗？我是 Linux 新手，如果你能用简短的语言解释一下，那将有很大帮助。
我在终端输入了以下几行：
/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
eval $(/home/linuxbrew/.linuxbrew/bin/brew shellenv)
brew update
注销服务器并重新登录，相同的终端会话
brew update
我收到错误：未找到命令“brew”
这是完整的终端会话：
user@laptop:~$ ssh -p port# user@ServerAddress
user@ServerAddress's password:
Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.0-37-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Mon 15 Jun 2020 03:04:03 AM UTC
System load: 0.02 Temperature: 60.0 C
Usage of /: 3.7% of 195.13GB Processes: 196
Memory usage: 2% Users logged in: 1
Swap usage: 0% IPv4 address for eno1: ServerAddress
* MicroK8s gets a native Windows installer and command-line integration.
https://ubuntu.com/blog/microk8s-installers-windows-and-macos
0 updates can be installed immediately.
0 of these updates are security updates.
Last login: Mon Jun 15 02:18:15 2020 from Address
user@server:~$ /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install.sh)"
==> This script will install:
/home/linuxbrew/.linuxbrew/bin/brew
/home/linuxbrew/.linuxbrew/share/doc/homebrew
/home/linuxbrew/.linuxbrew/share/man/man1/brew.1
/home/linuxbrew/.linuxbrew/share/zsh/site-functions/_brew
/home/linuxbrew/.linuxbrew/etc/bash_completion.d/brew
/home/linuxbrew/.linuxbrew/Homebrew
==> The following existing directories will be made writable by user only:
/home/linuxbrew/.linuxbrew/share/zsh
/home/linuxbrew/.linuxbrew/share/zsh/site-functions
Press RETURN to continue or any other key to abort
[sudo] password for user:
==> /usr/bin/sudo /bin/chmod u+rwx /home/linuxbrew/.linuxbrew/share/zsh /home/linuxbrew/.linuxbrew/share/zsh/site-functions
==> /usr/bin/sudo /bin/chmod 755 /home/linuxbrew/.linuxbrew/share/zsh /home/linuxbrew/.linuxbrew/share/zsh/site-functions
==> Downloading and installing Homebrew...
HEAD is now at 0125c4cd5 Merge pull request #7740 from vidusheeamoli/add-tapioca
Already up-to-date.
Warning: /home/linuxbrew/.linuxbrew/bin is not in your PATH.
==> Installation successful!
==> Homebrew has enabled anonymous aggregate formulae and cask analytics.
Read the analytics documentation (and how to opt-out) here:
https://docs.brew.sh/Analytics
No analytics data has been sent yet (or will be during this `install` run).
==> Homebrew is run entirely by unpaid volunteers. Please consider donating:
https://github.com/Homebrew/brew#donations
==> Next steps:
- Run `brew help` to get started
- Further documentation:
https://docs.brew.sh
- Install the Homebrew dependencies if you have sudo access:
Debian, Ubuntu, etc.
sudo apt-get install build-essential
Fedora, Red Hat, CentOS, etc.
sudo yum groupinstall 'Development Tools'
See https://docs.brew.sh/linux for more information.
- Configure Homebrew in your /home/user/.profile by running
echo 'eval $(/home/linuxbrew/.linuxbrew/bin/brew shellenv)' >> /home/user/.profile
- Add Homebrew to your PATH
eval $(/home/linuxbrew/.linuxbrew/bin/brew shellenv)
- We recommend that you install GCC by running:
brew install gcc
user@server:~$ eval $(/home/linuxbrew/.linuxbrew/bin/brew shellenv)
user@server:~$ brew update
Already up-to-date.
user@server:~$ exit
logout
Connection to ServerAddress closed.
user@laptop:~$ ssh -p port# user@ServerAddress
user@ServerAddress's password:
Welcome to Ubuntu 20.04 LTS (GNU/Linux 5.4.0-37-generic x86_64)
* Documentation: https://help.ubuntu.com
* Management: https://landscape.canonical.com
* Support: https://ubuntu.com/advantage
System information as of Mon 15 Jun 2020 03:12:51 AM UTC
System load: 0.05 Temperature: 57.0 C
Usage of /: 3.7% of 195.13GB Processes: 191
Memory usage: 2% Users logged in: 1
Swap usage: 0% IPv4 address for eno1: ServerAddress
* MicroK8s gets a native Windows installer and command-line integration.
https://ubuntu.com/blog/microk8s-installers-windows-and-macos
0 updates can be installed immediately.
0 of these updates are security updates.
Last login: Mon Jun 15 03:04:03 2020 from Address
user@server:~$ brew update
Command 'brew' not found, did you mean:
command 'brec' from deb bplay (0.991-10build1)
command 'qbrew' from deb qbrew (0.4.1-8build1)
Try: sudo apt install <deb name>
user@server:~$
可能相关的随机事实：
- 第三次安装 Ubuntu 20.04 LTS，每次都出现同样的问题（我花了一些时间才找出这个问题）
- 安装OS时只选择安装openSSH
谢谢阅读。
答案1
必须将此命令eval $(/home/linuxbrew/.linuxbrew/bin/brew shellenv)
添加到您的文件.bashrc末尾。
通过添加此命令，它将修改您的 PATH 变量。
这样之后命令brew才可用。