stty -f dev://ccpty0 scrollback
[system] Welcome, alice.

[system] sek 0.1.0

New here?  cat HELLO_WORLD for a tour of the system.

[system] sek 0.1.0
device: ccpty0
user: alice
shell: /bin/sh

[assistant] cat HELLO_WORLD

[user] sek is a small UNIX-like shell environment.

What you type is run as a command.
alice@sek:~$ 
[assistant] whoami

[user] alice
alice@sek:~$ 
[assistant] pwd

[user] /home/alice
alice@sek:~$ 
[assistant] cat /etc/hosts

[user] cat: /etc/hosts: not found
alice@sek:~$ 
[assistant] ls /etc

[user] fstab
group
motd
passwd
profile
shadow
alice@sek:~$ 
[assistant] echo "hello

[user] > 
[assistant] "

[user] hello
alice@sek:~$ 
[user] 

[user] alice@sek:~$ 
[assistant] cat ~/profile

[user] cat: ~/profile: not found

[user] alice@sek:~$ 
[assistant] touch profile; echo "my settings" > profile; cat profile

[user] my settings

[user] alice@sek:~$ 
[assistant] echo "new setting" >> profile

[user] alice@sek:~$ 
[assistant] cat profile

[user] my settings
new setting

[user] alice@sek:~$ 
[assistant] rm profile; echo "it's gone!"

[user] it's gone!

[user] alice@sek:~$ 
[assistant] mkdir mydir

[user] alice@sek:~$ 
[assistant] ls

[user] HELLO_WORLD

[user] hello.txt

[user] mydir

[user] newfile

[user] sek_files

[user] sek_subdir

[user] testdir

[user] tmp

[user] alice@sek:~$ 
[assistant] cd mydir; touch newfile2

[user] alice@sek:~/mydir$ 
[assistant] ls

[user] newfile2

[user] alice@sek:~/mydir$ 
[assistant] ../../../profile

[user] sh: ../../../profile: not found

[user] alice@sek:~/mydir$ 
[assistant] cd ../..; ls

[user] alice

[user] alice@sek:/home$ 
[assistant] cd alice/mydir/newfile2

[user] cd: alice/mydir/newfile2: not a directory

[user] alice@sek:/home$ 
[assistant] cd /home/alice/mydir/newfile2

[user] cd: /home/alice/mydir/newfile2: not a directory

[user] alice@sek:/home$ 
[assistant] cat newfile2

[user] cat: newfile2: not found

[user] alice@sek:/home$ 
[assistant] exit

root@sek:~# 