linux_wiki:add_new_partitions_and_logical_volumes_and_swap_to_a_system_non-destructively [Owlbear Consulting

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====== Add New Partitions And Logical Volumes And Swap To A System Non-destructively ======

**General Information**

Different methods of adding swap. 

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===== Swap with Logical Volumes =====

Create new partition with the Logical Volume type
<code bash>
fdisk /dev/sdb
n
Partition type: primary
Partition number: 1
First sector: default
Last sector: +1G
t
Hex code: 8e
w
</code>

\\
Setup LVM physical volume, volume group, logical volume
<code bash>
pvcreate /dev/sdb1
vgcreate vglocal /dev/sdb1
lvcreate -n lvswap -L 1G vglocal
</code>

\\
Format logical volume with swap, enable, and add to fstab
<code bash>
mkswap /dev/mapper/vglocal-lvswap
swapon /dev/mapper/vglocal-lvswap

vim /etc/fstab

/dev/mapper/vglocal-lvswap  swap  swap  sw  0 0
</code>

----

=====  Swap with Physical Partition =====

Create physical disk partition for swap
<code bash>
fdisk /dev/sdb
n
Partition type: primary
Partition number: 2
First sector: default
Last sector: +1G
t
Hex code: 82
w
</code>
  * Hex code 82 is Linux Swap

\\
Create the swap filesystem
<code bash>
mkswap /dev/sdb2
swapon /dev/sdb2
</code>
  * edit /etc/fstab if you want persistent changes

\\
View swap space
<code bash>
swapon -s
</code>

\\
Activate all swap on /etc/fstab
<code bash>
swapon -a
</code>
  * Turn off swap with: swapoff /dev/<devname> or swapoff -a

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