Problem about swap partition from newbie.-.

[legion101098]

I've just switched from XP to linux mint mate 18.3, and i've made some partitions, like efi, /home, swap, and root. For me it is pretty good OS, but when i checked the partition, i noticed that the swap partition on the off condition, so i tried to activate it, and then this message showed up ; swapon failed : device or resource busy. So, what does it mean by that? hope can find help for this question

[Sir Charles]

Could you please run the following commands one by one in a terminal and post the output here?

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swapon -s

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lsblk

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cat /etc/fstab

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sudo blkid -o list

Copy the output of each command you get in the terminal and paste it between code tags </> from the toolbar above the "edit-box".

[legion101098]

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christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ swapon -s
Filename				Type		Size	Used	Priority
/dev/dm-0                              	partition	24413692	0	-1
christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ lsblk
NAME           MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sdb              8:16   0  22,4G  0 disk  
sda              8:0    0 698,7G  0 disk  
├─sda4           8:4    0   395G  0 part  /home
├─sda2           8:2    0   525M  0 part  /boot/efi
├─sda5           8:5    0 279,4G  0 part  /
├─sda3           8:3    0  23,3G  0 part  
│ └─cryptswap1 253:0    0  23,3G  0 crypt [SWAP]
└─sda1           8:1    0   525M  0 part  /boot
christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda5 during installation
UUID=3cdaf3f6-93da-4851-8f8e-d0371737dd64 /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda1 during installation
UUID=5013eb9c-454e-40b1-abc3-00104649f9ce /boot           ext4    defaults        0       2
# /boot/efi was on /dev/sda2 during installation
UUID=2BF2-668E  /boot/efi       vfat    umask=0077      0       1
# /home was on /dev/sda4 during installation
UUID=ecba6706-ef1c-48f1-bcc9-379be1ff0f41 /home           ext4    defaults        0       2
# swap was on /dev/sda3 during installation
#UUID=9368ac4d-5462-4af3-a90d-af013e226bd4 none            swap    sw              0       0
/dev/mapper/cryptswap1 none swap sw 0 0
christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ sudo blkid -o list
[sudo] password for christofer: 
device     fs_type label    mount point    UUID
-------------------------------------------------------------------------------
/dev/sda1  ext4             /boot          5013eb9c-454e-40b1-abc3-00104649f9ce
/dev/sda2  vfat             /boot/efi      2BF2-668E
/dev/sda3  swap             (in use)       9368ac4d-5462-4af3-a90d-af013e226bd4
/dev/sda4  ext4             /home          ecba6706-ef1c-48f1-bcc9-379be1ff0f41
/dev/sda5  ext4             /              3cdaf3f6-93da-4851-8f8e-d0371737dd64
/dev/mapper/cryptswap1
           swap             [SWAP]         4354dd64-3f00-49e8-b589-e070bcd5b3ff
/dev/sdb                    (not mounted)  

here it is bro, hope you can analyze it. Thanks.

[legion101098]

Could you please run the following commands one by one in a terminal and post the output here?

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swapon -s

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lsblk

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cat /etc/fstab

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sudo blkid -o list

Copy the output of each command you get in the terminal and paste it between code tags </> from the toolbar above the "edit-box".

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christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ swapon -s
Filename				Type		Size	Used	Priority
/dev/dm-0                              	partition	24413692	0	-1
christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ lsblk
NAME           MAJ:MIN RM   SIZE RO TYPE  MOUNTPOINT
sdb              8:16   0  22,4G  0 disk  
sda              8:0    0 698,7G  0 disk  
├─sda4           8:4    0   395G  0 part  /home
├─sda2           8:2    0   525M  0 part  /boot/efi
├─sda5           8:5    0 279,4G  0 part  /
├─sda3           8:3    0  23,3G  0 part  
│ └─cryptswap1 253:0    0  23,3G  0 crypt [SWAP]
└─sda1           8:1    0   525M  0 part  /boot
christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sda5 during installation
UUID=3cdaf3f6-93da-4851-8f8e-d0371737dd64 /               ext4    errors=remount-ro 0       1
# /boot was on /dev/sda1 during installation
UUID=5013eb9c-454e-40b1-abc3-00104649f9ce /boot           ext4    defaults        0       2
# /boot/efi was on /dev/sda2 during installation
UUID=2BF2-668E  /boot/efi       vfat    umask=0077      0       1
# /home was on /dev/sda4 during installation
UUID=ecba6706-ef1c-48f1-bcc9-379be1ff0f41 /home           ext4    defaults        0       2
# swap was on /dev/sda3 during installation
#UUID=9368ac4d-5462-4af3-a90d-af013e226bd4 none            swap    sw              0       0
/dev/mapper/cryptswap1 none swap sw 0 0
christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ sudo blkid -o list
[sudo] password for christofer: 
device     fs_type label    mount point    UUID
-------------------------------------------------------------------------------
/dev/sda1  ext4             /boot          5013eb9c-454e-40b1-abc3-00104649f9ce
/dev/sda2  vfat             /boot/efi      2BF2-668E
/dev/sda3  swap             (in use)       9368ac4d-5462-4af3-a90d-af013e226bd4
/dev/sda4  ext4             /home          ecba6706-ef1c-48f1-bcc9-379be1ff0f41
/dev/sda5  ext4             /              3cdaf3f6-93da-4851-8f8e-d0371737dd64
/dev/mapper/cryptswap1
           swap             [SWAP]         4354dd64-3f00-49e8-b589-e070bcd5b3ff
/dev/sdb                    (not mounted)  

here it is bro, hope you can analyze it. Thanks.

[Sir Charles]

Hi legion101098,
First of all, I have to admit that this is a bit of "research area" for me, still being somewhat of a new-beginner myself but I am sure the information you provide will be helpful to the more advanced forum members.
By the looks of it

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christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ swapon -s
Filename				Type		Size	Used	Priority
/dev/dm-0                              	partition	24413692	0	-1

suggests that the swap partition is already activated, if I am not mistaken. So if you don't mind, would you run the following commands and post back the output:

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sudo cryptsetup status cryptswap1

Thanks!

[rene]

You needn't really bother posting more information it seems as the swapon -s output indicates a 24G swap partition (/dev/dm-0) being active.

24G is very large and useful only if you want it around in order to hibernate, but active it is. I expect you just noticed none being in use rather than inactive / "on the off condition"? The output of free will tell as well. Swap is (essentially) used only when real RAM fills up; if you also have 24G of RAM it's not surprising that swap will never be touched under normal circumstances.

[legion101098]

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christofer@christofer-HP-ENVY-TS-14-Sleekbook ~ $ sudo cryptsetup status cryptswap1
[sudo] password for christofer: 
/dev/mapper/cryptswap1 is active and is in use.
  type:    PLAIN
  cipher:  aes-xts-plain64
  keysize: 256 bits
  device:  /dev/sda3
  offset:  1024 sectors
  size:    48827392 sectors
  mode:    read/write

does it mean active ?
thanks by the way

[Sir Charles]

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~ $ sudo cryptsetup status cryptswap1
[sudo] password for christofer: 
/dev/mapper/cryptswap1 is active and is in use.

does it mean active ?

Yes, it does. Please refer to rene's explanation above as to why you probably see that nothing is being swapped to the swap partition.

[legion101098]

thanks bro, for your explanation

[Sir Charles]

You are welcome!
If you are satisfied with the outcome of the thread regarding your issue, please take a moment to mark it as solved by editing your first post and adding [SOLVED] to the title of the thread.

Cheers
Marziano