more cleanup

system/X.md

@@ -1,6 +1,6 @@
 ---
 title: "X"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 X is a server which listens to requests for display.
 

system/android.md

@@ -1,6 +1,6 @@
 ---
 title: "android"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # mtpfs
 

system/awk.md

@@ -1,6 +1,6 @@
 ---
 title: "awk"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # Basics
 

system/bash_tricks.md

@@ -1,6 +1,6 @@
 ---
 title: "bash_tricks"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # Automatic mp3 Tagging
 

system/character-encoding.md

@@ -1,6 +1,6 @@
 ---
 title: "character-encoding"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 Convert a text file from one encoding type to another with:
 

system/compression.md

@@ -1,6 +1,6 @@
 ---
 title: "compression"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # Tar
 

system/cronie.md

@@ -1,6 +1,6 @@
 ---
 title: "cronie"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 
 Various services from cron exist, e.g.
@@ -9,7 +9,7 @@ Various services from cron exist, e.g.
 
 start the cronie with
 
-> sudo systemctl start cronie
+> sudo Systemctl start cronie
 
 start a cron with 
 

system/e-mail.md

@@ -1,6 +1,6 @@
 ---
 title: "e-mail"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # Terminology
 

system/editors.md

@@ -1,8 +1,8 @@
 ---
 title: "editors"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
-The system's default text editor can be defined within /etc/profile.  It's given the variable `EDITOR`.
+The System's default text editor can be defined within /etc/profile.  It's given the variable `EDITOR`.
 
 Add these lines to /etc/profile:
 

system/elvish.md

@@ -1,6 +1,6 @@
 ---
 title: "elvish"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # Setup
 To run a shell as non-root, the shell must be listed in /etc/shells.

system/kernel.md

@@ -1,6 +1,6 @@
 ---
 title: "kernel"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 Check which kernet modules are loaded into memory
 

system/logs.md

@@ -1,6 +1,6 @@
 ---
 title: "logs"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 
 # Basic

system/mdadm.md

@@ -0,0 +1,33 @@
+---
+title: "mdadm"
+tags: [ "Documentation", "RAID" ]
+---
+# RAID5
+
+You will need 4 disks and the `mdadm` package.
+The total size will be equal to the disks x 3, because one will be used for redundancy.
+
+> sudo mdadm --create --verbose /dev/*md127* --level=5 --raid-devices=*4* */dev/sdb /dev/sdc /dev/sdd /dev/sde*
+
+Note the variable parts:
+
+- The name of the device could be `/dev/md12` or whatever
+- The number of devices could be larger, but must be at least 4 for raid 5
+- We end by listing all devices in the new `md` device.
+
+Now look at how the raid status:
+
+> cat /proc/mdstat
+
+This will increase until the entire thing is fine.
+
+Check the health of your `mdadm` array:
+
+> sudo mdadm --detail /dev/md127
+
+You should see `State : clean`. If you see it is `degraded`, then a disk has broken.
+
+## Replacing a Disk
+
+> sudo mdadm --add /dev/md127 /dev/sdb1
+

system/partitions.md

@@ -1,6 +1,6 @@
 ---
 title: "partitions"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # FDisk Basics
 
@@ -27,7 +27,7 @@ Note the asterisk marking the boot partition.
 
 fdisk will not help with a GPT formatted drive.  For this, use gdisk, which is mostly the same.
 
-Now that we have a partition, we can make it into a filesystem.  Most will use:
+Now that we have a partition, we can make it into a fileSystem.  Most will use:
 
 > sudo mkfs -t ext4 /dev/sdc1
 
@@ -35,7 +35,7 @@ or if you're making a swap partition, you can use:
 
 > sudo mkswap /dev/sdb2
 
-or for the reiser filesystem, we can use:
+or for the reiser fileSystem, we can use:
 
 > sudo mkreiserfs /dev/sdc2
 
@@ -65,7 +65,7 @@ or  divide things by inode - the thing which records where files are?
 
 > df -i
 
-Examine a filesystem with:
+Examine a fileSystem with:
 
 > sudo dumpe2fs /dev/sda1 | less
 
@@ -78,12 +78,12 @@ This will check sda1 every 30 boots.  It can also be checked every month.
 
 > sudo tune2fs -i 1m /dev/sda1
 
-This thing can also make a new label for the system:
+This thing can also make a new label for the System:
 
 > sudo tune2fs -L new_name /dev/sdb3
 
 # Repair
-Start by unmounting the filesystem.
+Start by unmounting the fileSystem.
 
 > sudo umount /dev/sdc1
 
@@ -112,15 +112,15 @@ or if you don't know the type, just try the lot:
 # File Systems
 xfs and zfs can only be expanded.
 
-# Shrink Filesystem
+# Shrink FileSystem
 
 NB: When I followed these instructions, the process destroyed my data. Seemed fine on the YouTube video.
 
-Check the filesystem's health:
+Check the fileSystem's health:
 
 > sudo e2fsck -f /dev/sdb1
 
-Resize the file system to something smaller than what you want, so here I want 500G and so I resize to 450 G.
+Resize the file System to something smaller than what you want, so here I want 500G and so I resize to 450 G.
 
 > resize2fs /dev/sdb1 450G
 
@@ -130,7 +130,7 @@ Then delete the partition with either gdisk or fdisk, depending upon the layout.
 
 > d
 
-Then make a new filesystem of the desired type with:
+Then make a new fileSystem of the desired type with:
 
 > n
 

system/snaps.md

@@ -1,6 +1,6 @@
 ---
 title: "snaps"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 > sudo apt-get purge -y snapd
 

system/systemd/journal.md

@@ -1,6 +1,6 @@
 ---
 title: "journal"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "systemd" ]
 ---
 
 Find errors since November

system/systemd/making-services.md

@@ -1,6 +1,6 @@
 ---
 title: "Making Services"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "systemd" ]
 ---
 # Basics
 

system/systemd/users.md

@@ -1,6 +1,6 @@
 ---
 title: "users"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "systemd" ]
 ---
 # Automatic Login
 

system/tmux.md

@@ -1,6 +1,6 @@
 ---
 title: "tmux"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 Start with:
 

system/upx.md

@@ -1,6 +1,6 @@
 ---
 title: "upx"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 upx compresses binaries, so they take up less disk space, but take longer to start.
 

system/urxvt.md

@@ -1,5 +1,5 @@
 ---
 title: "urxvt"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 Perl scripts typically kept in /usr/lib/urxvt/perl

system/virtualbox.md

@@ -1,61 +0,0 @@
----
-title: "virtualbox"
-tags: [ "Documentation", "system" ]
----
-# Setup
-
-## Arch Linux
-
-> sudo pacman -S virtualbox-host-modules-arch virtualbox-guest-iso
-
-> sudo modprobe vboxdrv
-
-> # vboxreload
-
-Make dd image into vdi
-
-> VBoxManage convertdd base.dd output.vdi --format VDI
-
-If this doesn't work, try to make a new bite size with just
-
-> sudo dd if=image.dd of=image2.dd bs=512 conv=sync
-
-## CLI Management
-
-List boxes:
-
-> VBoxManage list vms
-
-Start a headless instance
-
-> VBoxManage startvm "rata" --type headless
-
-To pause the machine:
-
-> VBoxManage controlvm "rata" pause --type headless
-
-You can do a number of things to virtualboxes this way:
-
-- startvm
-
-- pause
-
-- resume
-
-- poweroff
-
-## Creating Disks
-
-Creating a VM requires registering it:
-
-> VBoxManage createvm --name Ubuntu19.04 --register  --ostype Ubuntu
-
-> VBoxManage modifyvm Ubuntu19.04 --memory 1042
-
-> VBoxManage storagectl Ubuntu19.04 -name IDE --add ide --controller PIIX4  --bootable on
-
-Create just a disk with:
-
-VBoxManageg createhd --filename Ubuntu16.04 --size 5120
-
-

system/wine.md

@@ -1,5 +1,5 @@
 ---
 title: "wine"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 maybe run \n> sudo dpkg --add-architecture i386

system/xdg.md

@@ -1,6 +1,6 @@
 ---
 title: "xdg"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 
 What filetype is this file?

system/xkbmap.md

@@ -1,6 +1,6 @@
 ---
 title: "xkbmap"
-tags: [ "Documentation", "system" ]
+tags: [ "Documentation", "System" ]
 ---
 # Language Layouts