debian - 命令 "aptitude upgrade"在 Debian 上执行完全升级还是安全升级？

Question

命令aptitude full-upgrade 和aptitude safe-upgrade 都是documented ，包括 full-upgrade 的 dist-upgrade 别名。

但是，简单地 aptitude upgrade 也会以某种方式升级系统……它默认为哪种方式？另外我怎么会为自己找到这个？ man aptitude upgrade 没有帮助。

Answer 1

在source-code中可以看出(但不是文档)，upgrade 确实是 safe-upgrade 的别名:

else if(!strcasecmp(argv[0], "full-upgrade") ||
  !strcasecmp(argv[0], "dist-upgrade"))
{
   default_action = cmdline_upgrade;
   // [...]
   upgrade_mode = full_upgrade;
   // [...]
   resolver_mode = resolver_mode_full;
}
else if(!strcasecmp(argv[0], "safe-upgrade") ||
  !strcasecmp(argv[0], "upgrade"))
{
   default_action = cmdline_upgrade;
   // [...]
   upgrade_mode = safe_upgrade;
   // [...]
   resolver_mode = resolver_mode_safe;
}