Linux Distro – Nextra

Filesystem

Standard streams and its file descriptors
- stdin: 0
- stdout: 1
- stderr: 2
> by default redirects stdout, therefore > is equivalent to 1>
>&<FILE_DESCRIPTOR> redirects stdout to another stream.

echo "An error occurred" >&2 # Redirect stdout to stderr
&>, To redirect to either stdout or stderr, depending on the runtime outcome

if cmp a b &> /dev/null # Suppress output whether it's from stdout or stderr

Mount Point	UUID	Size	Partition Type	FS Type	Label
/dev/nvme0n1p1	8017-039C	629MB	EFI System	FAT32
/dev/nvme0n1p2	e962ae35-fee4-4f35-9a33-0995c4cea9e7	1.1GB	/boot	Ext4
/dev/nvme0n1p3	dce36504-d2fa-4016-b7e2-41e1ad785856	525GB	/home	Ext4
/dev/nvme0n1p5	1e4ce292-7d3c-44ee-be6d-e82edba14980	300GB	/var	Ext4
/dev/nvme0n1p6	b98df302-e2dc-4921-aec5-e60f2af98652	74GB	/	Ext4
/dev/nvme0n1p7	565efedc-19ec-4f20-965e-115a13099839	300GB		Ext4	Backup
/dev/nvme0n1p4	262a48c4-b1a6-412e-89ca-f386891b784d	12GB	Linux Swap	Swap

/swap
- What's the right amount of swap space for a modern Linux system? (opens in a new tab)
- Usage
  - Hibernation
  - Memory overflow
/var
- Could assign 500GB if possible
- Usage
  - Application installation
    - /var/lib/flatpak
    - /var/lib/snapd
  - Docker storage, cache, volumes, etc
    - /var/lib/docker
The order of partitions matters, and partitions should be created from the least possible to be resized to the most possible to be resized.
Resources
- 9.15.5. Recommended Partitioning Scheme (opens in a new tab)
- Filesystem Hierarchy Standard (opens in a new tab)

Use username/password to register a system

subscription-manager register --username $username --password $password --auto-attach

If doesn't work, use activation key and organization ID

subscription-manager register --org $organization_id --activationkey $activation_key