diff --git a/linux/automount_fstab.md b/linux/automount_fstab.md
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+# fstab
+
+1. Get the devices UUID `sudo blkid`
+2. Create a mount point. e.g. `/mnt/usb/`
+3. Add to fstab `vim /etc/fstab`
diff --git a/linux/ffmpeg.md b/linux/ffmpeg.md
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+`ffmpeg -y -f x11grab -s 1280x800 -i :0.0 -f alsa -i default out.mkv`
+
+`ffmpeg -y -i /dev/video0 out.mkv`
diff --git a/linux/hdd_partition_nuke.md b/linux/hdd_partition_nuke.md
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+# 
+
+# Find drives
+
+    lsblk
+
+The above command can be used to see all drives and partions, as well as where they're mounted.
+
+# Nuke
+
+To remove all data from a drive and replace it with nothing do
+
+    dd if=/dev/zero of=/dev/<drive> bs=1M
+
+You can append `status=progress` to the end to see how far it's going.
+
+This also words on partitions, you just need to make sure it's selected.
+
+    dd if=/dev/urandom
+
+Above is an alternative to replace the data blocks with random data. This is better for when giving the device to another person, but will take longer.
+
+# Parition
+
+This can be done with a number of utilities, such as `parted` and `fdisk`
diff --git a/linux/install_with_apt_dpkg.md b/linux/install_with_apt_dpkg.md
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+# Install with apt/dpkg
+
+Install from the repositories
+
+    apt install <package>
+
+Install a local .deb file
+
+    apt install <local package location>
+
+another way to install local .deb files
+
+    dpkg  -i <local package location>
diff --git a/linux/systemd.md b/linux/systemd.md
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+# Systemd
+
+It does too much for an init system, and lots of what it does is overwritten with other systems.
+
+The actual init system portion is fine though.
+
+https://www.howtogeek.com/687970/how-to-run-a-linux-program-at-startup-with-systemd/
diff --git a/wifi_cli b/wifi_cli
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+wpa_passphrase <network> <password> > /etc/wpa_supplicant/wpa_supplicant.conf
+
+
+sudo ip link set dev <device> down // up
+
+systemctl restart wpa_supplicant.service
+
+