crontab 报错

huoniao

我做了一个定时备份
root#[/]crontab -l
39 16 * * * fbackup -f /dev/rmt/0m -i /etc/group
却得到了mai如下:root#[/]mail
From root@root Sat Jan 10 16:39:31 EAT 2004
Received: (from root@localhost)
by root (8.9.3/8.9.3) id QAA28358
for root; Sat, 10 Jan 2004 16:39:31 +0800 (EAT)
Date: Sat, 10 Jan 2004 16:39:31 +0800 (EAT)
From: root@root
Message-Id: <200401100839.QAA28358@root>;
Subject: cron

fbackup(1004): session begins on Sat Jan 10 16:39:01 2004
fbackup(3203): volume 1 has been used 3 time(s)
fbackup(3024): writing volume 1 to the output file /dev/rmt/0m
fbackup(3055): total file blocks read for backup: 15
fbackup(3056): total blocks written to output file /dev/rmt/0m: 39


*************************************************
Cron: 前面的信息是标准输出
和您的一个 crontab 命令的标准错误:

fbackup -f /dev/rmt/0m -i /etc/group

这到底是怎么回事?谢谢指点!

huoniao

为什么各位老大不理我啊,ding

Shad

Your cron and fbackup do not have problem. The mail you received is a notification of the cron job, it's not an error.

huoniao

Cron: 前面的信息是标准输出
和您的一个 crontab 命令的标准错误:

fbackup -f /dev/rmt/0m -i /etc/group

那提示中的标准错误是什么意思啊?谢谢

Shad

That is normal.

The "标准错误" is just standard error, that is a Unix term. You know what is standard input (usually your keyboard), standard output(usually your terminal or console), standard error (the place that your process' errors go), right?

When you use cron, you did not redirect the standard error to anywhere else, so it just remind you the standard error is included in the email.

Nothing is wrong in your cron job and your fbackup.

rat326

楼主：你的cron没问题。Standard error（标准错误）是正常的输出。

哈哈呵呵

重定向输出试试！

day_dream

正常mail