$ whoami
yuma
$ pwd
/home/yuma/introduction
$ ls -l
.r--------  56 yuma 30 May 18:09 company
.rwxr--r--  51 yuma 30 May 18:09 greet
.rw-r--r-- 184 yuma 30 May 18:09 profile
$ ./greet
 _______
< Hello >
 -------
   \
    \
        .--.
       |o_o |
       |:_/ |
      //   \ \
     (|     | )
    /'\_   _/`\
    \___)=(___/
$ cat profile | jq
{
  "name": "Yuma Ishikawa",
  "age": 25,
  "interest": [
    "AWS",
    "Go",
    "Deno"
  ],
  "tools": [
    "Neovim",
    "WezTerm"
  ],
  "sites": [
    "https://twitter.com/yuma_katameoome",
    "https://github.com/yumafuu"
  ]
}
$ cat company | jq
{
  "name": "ispec-inc",
  "homepage": "https://ispec.world"
}