How do I find all files containing specific text on Linux?

grep -rnw '/path/to/somewhere/' -e 'pattern'

• -r or -R is recursive,
• -n is line number, and
• -w stands for match the whole word.
• -l (lower-case L) can be added to just give the file name of matching files.
• -e is the pattern used during the search

Along with these, --exclude, --include, 

Some time we want to configure the log for every website in a specifc folder here is how to add a cronjon for the last 10 days

37 3 * * * /usr/sbin/logrotate -f -s /var/www/share/etc/logrotate/{website_name}.status /var/www/share/etc/logrotate/{website_name}.conf

where {website_name} any name you want 

now what is the content of the {website_name}.conf

here is an example 

Use htop or top to  analyses the running process

run also ps auxf to see a detailed status of the current running processes.

To move SOURCE directory to a DEST directory use the mv command as follows:

mv source dest

mv /path/to/source /path/to/dest

You can use this command to find it

find . -name "*.xml" -mtime -1 -ls