[linux] 將指令的內容輸出到某檔案

use ">"

date +%Y%m%d > backcronjob.txt
lewis@ubuntu:/opt$ cat backcronjob.txt
20150318

lewis@ubuntu:/opt$ ls -l /opt/app/abStore_data/ > backcronjob.txt
lewis@ubuntu:/opt$ cat backcronjob.txt
total 4
drwxr-xr-x 4 root root 4096 Mar 18 13:14 data