报错解决：sh: 1: Syntax error: Bad fd number

转载于：
我在python中执行：
cmd = "xxx"
os.system(cmd)
报错：

解决方法：

The problem could be, that in Ubuntu 11.x /bin/sh is linked to /bin/dash and not to bin bash.
check the link:

ls -l /bin/sh 

If /bin/sh is a link to /bin/dash, change it to /bin/bash.

sudo mv /bin/sh /bin/sh.orig  

sudo ln -s /bin/bash /bin/sh