With script bash, read file line per line starting at the end

Shell Programming and Scripting
1

Hello,

I'm works on Ubuntu server

My goal : I would like to read file line per line, but i want to started at the end of file.

Currently, I use instructions :

while read line;
do
COMMAND
done < /var/log/apache2/access.log

But, the first line, i don't want this. The file is long so, i would like to start at the end of file.

I'm available for your questions.

Thanks.

2

Did you consider the tac command?

1 Like
3

Perhaps, modifying what you have already:

tac /var/log/apache2/access.log | while IFS= read line; do
    COMMAND using line
done
1 Like
4

If tac is not available try:

tail -r file

or

sed '1!G;h;$!d' file

See here:

2 Likes
5

You are in Ubuntu which by default it has tac, but in case you do not want to use it, you may use the other alternatives.

Let's give you one more:

perl -e 'print reverse <>' /var/log/apache2/access.log | while IFS= read line; do
    COMMAND using line
done
1 Like
6

Thanks for your answer.

I don't know "tac". He works with my script. GOOD :b::b::b:

Bye.

---------- Post updated at 12:08 PM ---------- Previous update was at 12:07 PM ----------

solved