我的服务器:
Linux dhcpns 3.19.0-28-generic #30-Ubuntu SMP Mon Aug 31 15:52:51 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
我的Python脚本:
^{pr2}$当我从命令行运行脚本时,它会产生预期的输出。
但是,当我从crontab -e
调用脚本(很明显,将输出重定向到文件)时,脚本失败。在
日志:
Sep 28 18:36:01 dhcpns testarp.py[9984]: OS system call failed.
Sep 28 18:36:01 dhcpns testarp.py[9984]: Traceback (most recent call last):
Sep 28 18:36:01 dhcpns testarp.py[9984]: File "/home/ubuntu/testarp.py", line 23, in <module>
Sep 28 18:36:01 dhcpns testarp.py[9984]: lstArp = getarp()
Sep 28 18:36:01 dhcpns testarp.py[9984]: File "/home/ubuntu/testarp.py", line 10, in getarp
Sep 28 18:36:01 dhcpns testarp.py[9984]: arp = sp.Popen(cmd, stdout=sp.PIPE, stderr=sp.PIPE)
Sep 28 18:36:01 dhcpns testarp.py[9984]: File "/usr/lib/python2.7/subprocess.py", line 710, in __init__
Sep 28 18:36:01 dhcpns testarp.py[9984]: errread, errwrite)
Sep 28 18:36:01 dhcpns testarp.py[9984]: File "/usr/lib/python2.7/subprocess.py", line 1335, in _execute_child
Sep 28 18:36:01 dhcpns testarp.py[9984]: raise child_exception
Sep 28 18:36:01 dhcpns testarp.py[9984]: OSError: [Errno 2] No such file or directory
世贸基金会? 我错过了什么?在
通过cron运行的命令继承不同的环境。特别是,
PATH
envvar可能不同。要解决此问题,请在Python脚本中指定arp
程序的完整路径,或在相应的crontab中显式配置PATH
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