I came across a shell script where echo $? was used. What does this mean . How can we use this in a shell script. Are there any references for this.

Thanks for spending time to read my concern. How to get serial number of laptop display screen? I am facing "White screen" issue with my laptop screen. I ...

I scanned a brochure to PDF. It was portrait & should be landscape so I rotated the page in Acrobat and saved the PDF. I sent it to OneNote 2010 using...

If I'm sniffing my computer and see some packet with TTL=64, does it means that the packet came from a computer inside my network, or it can be anyon...

I am trying to change a MSWord 2013 mail merge document so that it points to a MS SQL DB rather then the original MS Access DB which just linked to the SQ...

I have a word 2007 document in portrait mode. I have a table that is too wide to fit in 8.5" but would fit in 11". Is there a way to make just one page la...

Suppose I have a sequence of PNG image files which may or may not contain an alpha channel (assume those that do have an alpha channel actually utilize it...

I have an HP laptop that cannot find any wifi networks. It can however connect to internet through ethernet. It doesn't appear to be anything simple ...

I need to create a text file which should contain random text data that can be read by human. I know that we can use /dev/urandom and /dev/random for gett...

I usually use Lenovo Vantage and Windows Update to keep my windows 10 and all the drivers up to date on my Lenovo Thinkpad. Now I found out that when I en...