Scripting help: Print first and last line of a file ?

[rveri]

Hi Experts,
I want to get first and last line from a file with a command by one time parsing the file:



Example:
# cat datafile
1. This is the first Line.
2. AAA BBB CCC
3. DDD EEE FFF
---- Many lines
---- Many Lines
LastLine. This is the LastLine of the File.



Output should be:
1. This is the first Line.
LastLine. This is the LastLine of the File.



Thanks in adv.

[Raj D. · Accepted solution]

F=datafile ;t=`wc -l $F|awk '{print $1}'`; sed -n "1p; $t p" $F

[James R. Ferguson]

Hi Rveri:

Simply:

# sed -ne '1p;$p' file

Regards!

...JRF...

[Raj D.]

F=file ;l=`sed -n '$=' $F`;awk -v v=${l} 'NR==1||NR==v' $F