如何在Google计算引擎上启用bash完成？

Question

我正在运行的计算实例是一个Debian Buster。通常存在一个/etc/bash_completion文件。但是对于GCE来说，它不见了。他们甚至在默认的~/.bashrc中添加了一个部分来引用bash完成文件，而这些文件都不存在。

if ! shopt -oq posix; then
  if [ -f /usr/share/bash-completion/bash_completion ]; then
    . /usr/share/bash-completion/bash_completion
  elif [ -f /etc/bash_completion ]; then
    . /etc/bash_completion
  fi
fi

Answer 1

您是对的，它不是默认安装的，我在自己的项目中尝试过创建一个新的Debian实例，而且/etc/bash_completion不存在。

/etc$ ls -l bash_completion
ls: cannot access 'bash_completion': No such file or directory

只有在安装bash完成后，/etc/bash_completion文件才会出现.

sudo apt-get install bash-completion

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
  bash-completion
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 208 kB of archives.
After this operation, 1397 kB of additional disk space will be used.
Get:1 http://deb.debian.org/debian buster/main amd64 bash-completion all 1:2.8-6 [208 kB]
Fetched 208 kB in 0s (960 kB/s)     
Selecting previously unselected package bash-completion.
(Reading database ... 37801 files and directories currently installed.)
Preparing to unpack .../bash-completion_1%3a2.8-6_all.deb ...
Unpacking bash-completion (1:2.8-6) ...
Setting up bash-completion (1:2.8-6) ...
Processing triggers for man-db (2.8.5-2) ...

安装后：

/etc$ ls -l bash_completion
-rw-r--r-- 1 root root 45 Feb 11  2019 bash_completion