A1～4

A-1,2,3

saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi$ cd test1234
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234$ mkdir test.txt
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234$ mkdir a1
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234$ ls
a1  test.txt
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234$ cd a1
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ mkdir a11
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ ls
a11

A4

saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ echo hello
hello
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ nano
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ sh A4
A4  A4.sh  a11
usagE
kitune
tanuki
A4  A4.sh  a11
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ nano A4
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ sh A4
usagE
kitune
tanuki
saki14moro@DESKTOP-GI15UG8:/mnt/c/Users/Morozumi/test1234/a1$ cat A4

echo usagE
echo kitune
echo tanuki