Get the bottom line of a file to the top of the file


 
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# 1  
Old 11-04-2009
Get the bottom line of a file to the top of the file

Hi,

i have a small requirement where i have to get the bottom most line from a file to the topmost position. a small example is shown below..

$ cat beep.txt
It is first documented as being played in southern England.
In the 16th century.
By the end of the 18th century,
Cricket is a bat-and-ball team sport.


i want it as

$ cat beep.txt
Cricket is a bat-and-ball team sport.
It is first documented as being played in southern England.
In the 16th century.
By the end of the 18th century,


the problem is this file gets updated daily so each time i run the script i want to get the bottom most thing in the top most position....

Thanks for the help in advance Smilie
# 2  
Old 11-04-2009
You can use this code:

Code:
(
tail -1 beep.txt
sed "$ d" beep.txt
) > beep.new.txt

# 3  
Old 11-04-2009
You can use sed for this as

Code:
Code:
cat beep.txt | sed -ne '1!G' -e 'h' -e '$p'

# 4  
Old 11-04-2009
Quote:
Originally Posted by oky
You can use sed for this as

Code:
Code:
cat beep.txt | sed -ne '1!G' -e 'h' -e '$p'

I think that it isnīt valid for his requirement. That command will reverse all lines of the file. Isnīt it ?
# 5  
Old 11-04-2009
@pogdorica

yes you are right . The code you gave is working like miracle and is as per the requirement. Thanks for the effort.Smilie
# 6  
Old 11-04-2009
ever heard of "tac" (reverse cat)
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