can anybody explain this please... head -n FILENAME | tail -1
 

hi a am a total newbie to linux n cli, can anybody explain this please...

head -n FILENAME | tail -1

&

sed -n "FILENUMBERp" filename


please be detailed in your answers.... I will be thankful

see the relevent man pages this is basic stuff so come on put a bit of effort into it

man head
man tail
man sed, if you have it installed

Also online at
http://linux.die.net/man/1/head
http://linux.die.net/man/1/tail
http://linux.die.net/man/1/sed

So head -n FILENAME gets the first -n lines of a FILENAME.
tail gets the last lines.

sed is a stream editor.
https://www.gnu.org/software/sed/manual/sed.html
http://sed.sourceforge.net/sed1line.txt