因此，当我打开一个终端 (ctrl+alt+t) 时，提示显示大约需要 6 秒，并且我可以观察到（在另一个终端上运行 top）它占用了 99% 的 CPU 来执行此操作。
是什么原因造成的？它之前立即加载。
我正在运行 Ubuntu 13.04，我的 CPU 是 Intel Core i7-2600K @ 3.4GHz，我有 16GB 的 RAM。
~/.profile:
# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.
# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install …