if you actually have Debian working and an iso and an USB stick and some different Linux Distro then.... wait for it ... plug in your usb stick you are going to use, and unplug everything else from USB Ports.
Code:
1. sudo blkid (gets you address where USB Stick is plugged in)
sudo dd if=/slackware64-14.2-install-dvd.iso of=/dev/sdx && sync
replace name of that iso with whatever you have,
windows iso not work like that. You obviously have internet to download a new OS even and you have time to install a different Linux he is gone for 2 weeks. plenty of time to switch to a OS that is not giving you grief with apt-get ..
be in the same directory as the iso is, then run that dd command - it will distroy everything that is on it and put that OS onto it. so be sure you can spare that USB Stick to use.
let it run until finished.
if a live OS you can boot it, if it has some type of movie player ie mplayer or vlc etc then you can hopefully know how to get to your movies if in files to watch them or use it to get to internet viewing seeings how your apt-get is screwed up?
Code:
userx%slackwhere ⚡ ~ ⚡> sudo blkid
/dev/sda1: LABEL="System Reserved" UUID="7E88DA2288D9D8AB" TYPE="ntfs" PARTUUID="0f3f3740-01"
/dev/sda2: UUID="01D285E8BED961F0" TYPE="ntfs" PARTUUID="0f3f3740-02"
/dev/sda3: UUID="FC9AF6529AF608C2" TYPE="ntfs" PARTUUID="0f3f3740-03"
/dev/sda5: UUID="8874f530-39a7-4bba-b71c-cc3270cdd826" TYPE="ext4" PARTUUID="0f3f3740-05"
/dev/sda6: UUID="d6786828-a438-4859-8d34-6b1e1b39995a" TYPE="ext4" PARTUUID="0f3f3740-06"
/dev/sda7: LABEL="home" UUID="06c24029-5acf-4981-aeda-b998cdff7a07" TYPE="ext4" PARTUUID="0f3f3740-07"
/dev/sdb1: UUID="649ba476-b2cd-4f01-aecf-a0bdfb07600b" TYPE="ext4" PARTUUID="fce413b9-39d4-47e2-9874-9de06ca449b4"
/dev/sdb2: UUID="4f92ff72-fb4c-42da-ab2a-33e83c7afbb7" TYPE="ext4" PARTUUID="e8bc5245-f3dc-4bc5-b139-9421dc60e6ad"
/dev/sdb3: LABEL="mirror" UUID="6be32a12-8c17-4d62-8104-521d831605d2" TYPE="ext4" PARTUUID="3f2569f7-d0ec-41d5-9da1-1494b5b9ee20"
/dev/sdb4: LABEL="data" UUID="c09cf9d3-5a6b-449f-b002-39afac8d5ee1" TYPE="ext4" PARTUUID="dd666f38-c964-4ab4-b15a-63e114186687"
/dev/sdb5: LABEL="ntfs" UUID="4338B0E25081A74A" TYPE="ntfs" PARTUUID="8658f29b-cecf-472d-aef1-10878475f46e"
/dev/mmcblk0p1: UUID="f61998c9-4354-49c2-a87f-3a1e63a4c598" TYPE="swap" PARTUUID="0002a713-01"
/dev/sdc1: LABEL="3TB-External" UUID="66bccf31-5f4d-48c1-8283-21be4449e987" TYPE="ext4" PARTLABEL="3TB" PARTUUID="841d1e19-986e-447f-a7aa-ca6dffa8ce58"
/dev/mmcblk0: PTUUID="0002a713" PTTYPE="dos"
userx%slackwhere ⚡ ~ ⚡>
where the USB Port is /dev/sdc1 remove the number and just /dev/sdc
where x=c in that command above.