update readme

.gitignore

@@ -1,3 +1,4 @@
 # emacs backups
 
 *~
+\#*\#

README.md

@@ -1,4 +1,10 @@
 # cosmicvoage-backup
 
-A simple script to backup the cosmic voyage files dir to a dir in  the home dir
-
+A simple script to backup the cosmic voyage files dir to a dir in  the home dir
+
+To use the script, either run in manually or put it into your crontab
+
+$ crontab -e
+
+0 1 * * *	$HOME/bin/backup_cosmicvoyage
+

backup_cosmicvoyage

@@ -0,0 +1,21 @@
+#! /bin/bash
+
+SHIPS=~/ships
+BACKUP=~/backup-ships
+
+test -d $SHIPS || (echo "ships does not exit" ; exit 1)
+
+test -d $BACKUP || mkdir $BACKUP
+
+cd $SHIPS
+
+TS=`date -u +%Y-%m-%dZ%H:%M`
+
+TGZ="$BACKUP/ships-$TS.tar.gz"
+
+echo backing up $SHIPS to $TGZ
+
+tar cvfz $TGZ */*.txt */LICENSE
+
+test -f $TGZ && echo backup of file $TGZ was successful
+