Merge pull request #55 from cure/patch-1

avoid the string 'UID' in Activity.log

Author: chassing

README.md

@@ -275,7 +275,7 @@ A collection of linux sysadmin/devops interview questions. Feel free to contribu
 * How to send an email without a mail client, just on the command line?
 * Write a ```get_prim``` method in python/perl/bash/pseudo.
 * Find all files which have been accessed within the last 30 days.
-* Explain the following command ```(date ; ps -ef | awk '{print $1}' | sort | uniq | wc -l ) >> Activity.log```
+* Explain the following command ```(date ; ps -ef |tail -n +2 | awk '{print $1}' | sort | uniq | wc -l ) >> Activity.log```
 * Write a script to list all the differences between two directories.
 * In a log file with contents as ```<TIME> : [MESSAGE] : [ERROR_NO] - Human readable text``` display summary/count of specific error numbers that occurred every hour or a specific hour.