也许有人不知道这个 dcron

ServerOnly

什么是经典？我认为这个就是！向作者致敬！

其简洁程度正是我们所追求的，我一直用的都是这个，虽然是94年的东东...
总共只有两个文件:

2. root@domain:~# ls /mnt/lfs/usr/bin/cron* -l
3. -rwxr-x---  1 root root 14888 Jan  1 08:00 /mnt/lfs/usr/bin/crond
4. -rwxr-x---  1 root root 10020 Jan  1 08:00 /mnt/lfs/usr/bin/crontab
5. root@domain:~#

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看看 README 吧

2. CREDITS
4.     I finally got tired of all of these wild cron programs that take the
5.     task of running timed jobs to ridiculous extremes in terms of
6.     capabilities and unnecessary features.  So here is my entry:  a
7.     crond/crontab combination that is simple and elegant, and hopefully
8.     secure to boot.  This cron implements reasonable features in terms
9.     of field specification in the crontab and allows individual user
10.     crontabs.  
12.     This program is written entirely from scratch by yours Truely (sig
13.     at bottom).
15.     All jobs are run with /bin/sh for conformity and portability, thereby
16.     avoiding the mess that occurs with other cron's that try to use the
17.     user's perfered shell, which breaks down for special users and even makes
18.     some of us normal users unhappy (for example, /bin/csh does not use a true
19.     O_APPEND mode and has difficulty redirecting stdout and stderr both to
20.     different places!).  You can, of course, run shell scripts in whatever
21.     language you like by making them executable with #!/bin/csh or whatever
22.     as the first line.  If you don't like the extra processes, just 'exec'
23.     them.
25.     Under the same reasoning, this cron does not allow you to specify
26.     environment variables or other stuff better left specified as
27.     arguments to a shell script.  Talk about nonsense!
29.     The programs were written with an eye towards security, hopefully I
30.     haven't forgotton anything.  The programs were also written with an
31.     eye towards nice, clean, algorithmically sound code.  It's small, and
32.     the only fancy code is that which deals with child processes.  I do
33.     not try to optimize with vfork() since it causes headaches and is
34.     rather pointless considering I'm execing a shell most of the time,
35.     and I pay close attention to leaving descriptors open in the crond
36.     and close attention to preventing crond from running away.

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请去掉附件 txt 扩展名。

d00m3d

是的，我也不知道。。。:p

ServerOnly

it is sexy