Michael Ellick Ang's questions

How do I remove empty/blank (including spaces only) lines in a file in Unix/Linux using the command line?

contents of file.txt

Line:Text
1:<blank>
2:AAA
3:<blank>
4:BBB
5:<blank>
6:<space><space><space>CCC
7:<space><space>
8:DDD

output desired

1:AAA
2:BBB
3:<space><space><space>CCC
4:DDD

What Mac application should I use to allow me to connect to Cisco VPN?

Can someone explain to me what's the difference of SID, DB Name, DB Domain, Global Database Name, Service Name, Service Alias and Instance Name in Oracle ?

Thanks Michael

A csv file with multiple records is delimited by |.

field1|field2|field3|field4|field5

I want to check if field3 is blank or contains "space" characters only. If it is blank or space, the whole line should show up.

how do i verify if a cpu has the necessary requirements to run hyper v ?

I would like to know:

• What's the difference between Git and Mercurial?
• What are the pros and cons of using them?
• How good is the Windows support for both tools?