打字openssl version会出现以下内容：
The program 'openssl' is currently not installed. You can install it by typing:
sudo apt-get install openssl
输入sudo apt-get install openssl表明它已经安装：
~$ sudo apt-get install openssl
[sudo] password for systemagic:
Reading package lists... Done
Building dependency tree
Reading state information... Done
openssl is already the newest version..
0 to upgrade, 0 to newly install, 0 to remove and 6 not to upgrade.
尝试找到它 - 我可以看到其中有一个文件./usr/bin/openssl
/$ sudo find -name "openssl"
./etc/apparmor.d/abstractions/openssl
./etc/bash_completion.d/openssl
./usr/bin/openssl …openssl ×1