按照介绍的

我是看的这个介绍
http://wiki.linuxdeepin.com/index.php/D ... B%E7%BB%8D

但是当我运行“apt add ppa:banshee-team/banshee-unstable”时，出现了如下提示：

1. No command 'apt' found, did you mean:
2. Command 'aptd' from package 'aptdaemon' (main)
3. Command 'xapt' from package 'xapt' (universe)
4. Command 'opt' from package 'llvm' (universe)
5. Command 'apm' from package 'apmd' (main)
6. Command 'atp' from package 'atp' (universe)
7. Command 'ppt' from package 'bsdgames' (universe)
8. Command 'apf' from package 'apf-firewall' (universe)
9. Command 'apg' from package 'apg' (main)
10. Command 'gpt' from package 'gpt' (universe)
11. Command 'ant' from package 'ant' (main)
12. Command 'ant' from package 'ant1.7' (universe)
13. Command 'at' from package 'at' (main)
14. Command 'pat' from package 'dist' (universe)
15. Command 'aft' from package 'aft' (universe)
16. apt: command not found

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