如何从目录中查找最新文件

Question

I want to parse a log file which is in /X on a Linux server. Below is the scenario :

• Log files are pushed into /X at a regular interval of 5 minutes or when a log file size becomes 5MB
• Now we are trying to make a parser which parses the latest created log file and gets the required information

How can I retrieve the file name of the most recent log file?

Answer 1

#!/bin/bash

dir=/X
for file in "${dir}"/*; do
    [ -f "${file}" ] || continue
    [ "${file}" -nt "${newest}" ] && newest=${file}
done

echo "the most recentently modified file is '${newest}'"

Answer 2

Hi Abhinav if you only want to get file name you can use ls -Art | tail -n 1 command in your script.

Answer 3

ls -t will sort files by modification time (in your case it's the same as creation time, since the files are written once), and head -1 will give the first file, ie the most recent:

ls -t /X | head -1

A slight variation, which I think is more common, is listing in reverse ( -r ) and using tail :

ls -rt /X | tail -1