Delete Excessive Files in a Directory:

If your system is slowing down due to too many files in a directory, you need a reliable way to delete excessive files in a directory efficiently. Overloaded directories can cause performance issues and take up unnecessary disk space.

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, 

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