If you have a VPS or dedicated server, then you may access the Terminal by going to Advanced > Terminal.
Here are some usuful commands.
Navigate to home
cd
Navigate to folder
cd folder_name
Clear log
clear
List down all the content inside the directory
ls
Count Files using wc
ls | wc -l
Delete Files Older Than x Days on Linux
First find the files. For example if you want to find all files that start with wp-load and are older then 5 days then run this command:
find 'firstletters'* -mtime +5
Then delete them
find 'firstletters'* -mtime +5 -exec rm -f {} \;
Get a file
When the cron job executes wget command (fetches URL resource), it creates a new file every time. It doesn’t overwrite the old downloaded file, but appends a number so by time, there will be thousands of files unless you tweak your crontab to suppress the output. So in order to suppress the output:
wget -q -O - "http://example.com/target.php" >/dev/null 2>&1