updated lab04

labs/lab04-busybox.pdf

labs/lab04-resources/www/cgi-bin/cpu.sh

labs/lab04-resources/www/cgi-bin/kernel.sh

labs/lab04-resources/www/cgi-bin/list_files.sh

labs/lab04-resources/www/cgi-bin/upload.c

labs/lab04-resources/www/cgi-bin/upload.cfg

labs/lab04-resources/www/cgi-bin/uptime.sh

labs/lab04-resources/www/gohome.png

labs/lab04-resources/www/index.html

labs/lab04-resources/www/upload/BadPage.html

labs/lab04-resources/www/upload/OkPage.html

...ab04-resources/www/upload/files/Embedded_Linux_Primer.jpg

labs/lab04-resources/www/upload/files/linux_distribs.jpg

...b04-resources/www/upload/files/preinternet_chat_rooms.jpg

labs/lab04-resources/www/upload/files/sudo.png

labs/lab04-resources/www/upload/files/upgrading.png

labs/lab04-resources/www/upload/logs/upload.log