Listing 5. Set Up a cron Job to Aggregate Blogs

$ mkdir -p ~/mycron
$ cd ~/mycron
$ vi upd-planet.sh
#!/bin/sh
cd ~/planet;
http_proxy=http://dairiserver:3128/ \
  python planet.py me-meta/config.ini
$ chmod +x upd-planet.sh
$ echo \
'00 04  *  *  * /home/ben/mycron/upd-planet.sh' \
 >|upd-planet.cron

# only if you already use cron from outside ~/mycron
$ crontab -l >|oldcrontab.cron

$ cat *.cron >|newtab
$ crontab newtab
$ rm -f oldcrontab.cron