摘要：
1. who : The ‘$ who’ command displays all the users who have logged into the system currently. 2. pwd : The ‘$pwd’ command stands for ‘present working 阅读全文
摘要：
Today is my first phone interview since I start to look for jobs. I feel so nerves before the clock run to 10:00 am. Actually, zzz and I go through th 阅读全文