How to solve the "-bash: python: command not found" error on Linux / Unix VPS

Direct installation is suitable.

1. Under Ubuntu/Debian
apt-get install python
or
apt-get install python3

2. Oracle/RHEL (Red Hat)/CentOS
yum install python

3. Fedora
dnf install python
or
dnf install python3

4. Under Arch
pacman -S python2
or
pacman -S python3

5. Under Suse/OpenSUSE
zypper install python
or
zypper install python3

6. Install Python v2.x under FreeBSD:
pkg install python2
or
cd /usr/ports/lang/python2/ && make install clean

Install Python v3.x:
pkg install python3
or
cd /usr/ports/lang/python3/ && make install clean

7. OpenBSD
pkg_add python
or
doas pkg_add python

8. MacOS X
brew install python3

confirm:
type -a python
which python
ls -l /usr/bin/python
ls -l /usr/bin/python*

via: https://www.cyberciti.biz/faq/bash-python-command-not-found/