a-Shell mini uses iPadOS 13+ “multiple windows” ability, so you can run multiple shells at the same time, with different commands, in different directories.
a-Shell mini is a complete local terminal emulator, allowing to run most Unix commands on you iOS device.
If you need more commands, please consider a-Shell, which has more Python packages, more JavaScript modules, Perl, make, a C and C++ compiler and TeX.
a-Shell mini includes Python, Lua, JavaScript and webAssembly for programming and scripting.
There are also multiple network utilities: nslookup, ping, whois, ifconfig... Type help for help, help -l to get the full list of commands.