【求助】What do these two line mean?

aladdinlamp

1^# aladdinlamp 发表于 2004-11-19 10:38

stty erase '^h'

[ -f /tmp/test.txt ] || > /tmp/test.txt

I tried but nothing happened. Would someone explain for me? Thx!　　　　　　

dearvoid

2^# dearvoid 发表于 2004-11-19 12:18

1）stty erase "^H"：将 <ctrl+h> 定义为删除字符。详情请 man stty
2）[ -f /tmp/test.txt ] || > /tmp/test.txt：如果不存在文件 /tmp/test.txt 就新建之（用 touch 会简单些）　　　　　　