linux echo 向文件中追加信息

song@ubuntu:~$ more test.py
1
2
song@ubuntu:~$ echo 825 >>test.py
song@ubuntu:~$ echo '523' >>test.py
song@ubuntu:~$ echo hello python >>test.py
song@ubuntu:~$ echo 'hello world' >>test.py
song@ubuntu:~$ more test.py
1
2
825
523
hello python
hello world
song@ubuntu:~$