all commands are mentioned below--
1-List all the available packages in termux:
pkg list-all
2-Check your Username :
whoami
3-Check your Memory Usage in Termux:
free -h -t
4-Check your Termux usage time :
uptime
5-Know Which directory you are in:
pwd
6- Create a folder or a directory:
mkdir folderName
7-Grant storage permission:
termux-setup-storage
8- Delete a folder or a directory:
rmdir folderName
9-See the Details of a Package in Termux:
apt show package name
10-cal && date