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Linux swap file creation and management
Where to put swap space, at beginning or end and other swap questionsKVM and swap problemWhy my partitions don't show the right capacity on a 4096 byte physical block hard drive?Linux, SSD and swapHow to safely turn off swap permanently and reclaim the space? (on Debian Jessie)Swap Total and Swap free 0K totalHow do I remove a swap partition that no longer exists?Ubuntu 14.04 32 bit swapfile max 60k issueSwap partition and swap file at the same time?Will swap file engage automatically when I write too much to /dev/shm
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
I want to increase my swap size to be able to have the hibernate option. First, I tried to add some swapfile. I followed
https://bogdancornianu.com/change-swap-size-in-ubuntu/
and typed this in my terminal:
sudo dd if=/dev/zero of=swapfile bs=1G count=16
I get:
16+0 records in
16+0 records out
17179869184 bytes (17 GB, 16 GiB) copied, 206.949 s, 83.0 MB/s
then, I followed the instructions:
sudo mkswap /swapfile
But I get this error:
mkswap: cannot open /swapfile: No such file or directory
Then, I decided to resize my swap partition instead of swapfile. So I want to delete them. (I didn't create any before so I assume I can delete them all?)
I followed this:
https://askubuntu.com/questions/904628/default-17-04-swap-file-location
I tried:
$ cat /proc/swaps
$ grep swap /etc/fstab
But I get nothing from the first one. Output from the second one is:
total used free shared buff/cache
available
Mem: 11862 3498 1014 138 7349
7907
Swap: 0 0 0
I also tried (after reboot):
swapon -s
and get
Filename Type Size Used Priority
/dev/sdb3 partition 3905532 0 -2
I wonder that did I successfully create swapfiles? How do I delete them if I did?
swap
add a comment |
I want to increase my swap size to be able to have the hibernate option. First, I tried to add some swapfile. I followed
https://bogdancornianu.com/change-swap-size-in-ubuntu/
and typed this in my terminal:
sudo dd if=/dev/zero of=swapfile bs=1G count=16
I get:
16+0 records in
16+0 records out
17179869184 bytes (17 GB, 16 GiB) copied, 206.949 s, 83.0 MB/s
then, I followed the instructions:
sudo mkswap /swapfile
But I get this error:
mkswap: cannot open /swapfile: No such file or directory
Then, I decided to resize my swap partition instead of swapfile. So I want to delete them. (I didn't create any before so I assume I can delete them all?)
I followed this:
https://askubuntu.com/questions/904628/default-17-04-swap-file-location
I tried:
$ cat /proc/swaps
$ grep swap /etc/fstab
But I get nothing from the first one. Output from the second one is:
total used free shared buff/cache
available
Mem: 11862 3498 1014 138 7349
7907
Swap: 0 0 0
I also tried (after reboot):
swapon -s
and get
Filename Type Size Used Priority
/dev/sdb3 partition 3905532 0 -2
I wonder that did I successfully create swapfiles? How do I delete them if I did?
swap
1
Hello, our new contributor! Please read our guidelines, and maybe more important note: You should really really read properly what you are typing, there is no space for typos in Linux!
– Vlastimil
Mar 26 at 16:19
add a comment |
I want to increase my swap size to be able to have the hibernate option. First, I tried to add some swapfile. I followed
https://bogdancornianu.com/change-swap-size-in-ubuntu/
and typed this in my terminal:
sudo dd if=/dev/zero of=swapfile bs=1G count=16
I get:
16+0 records in
16+0 records out
17179869184 bytes (17 GB, 16 GiB) copied, 206.949 s, 83.0 MB/s
then, I followed the instructions:
sudo mkswap /swapfile
But I get this error:
mkswap: cannot open /swapfile: No such file or directory
Then, I decided to resize my swap partition instead of swapfile. So I want to delete them. (I didn't create any before so I assume I can delete them all?)
I followed this:
https://askubuntu.com/questions/904628/default-17-04-swap-file-location
I tried:
$ cat /proc/swaps
$ grep swap /etc/fstab
But I get nothing from the first one. Output from the second one is:
total used free shared buff/cache
available
Mem: 11862 3498 1014 138 7349
7907
Swap: 0 0 0
I also tried (after reboot):
swapon -s
and get
Filename Type Size Used Priority
/dev/sdb3 partition 3905532 0 -2
I wonder that did I successfully create swapfiles? How do I delete them if I did?
swap
I want to increase my swap size to be able to have the hibernate option. First, I tried to add some swapfile. I followed
https://bogdancornianu.com/change-swap-size-in-ubuntu/
and typed this in my terminal:
sudo dd if=/dev/zero of=swapfile bs=1G count=16
I get:
16+0 records in
16+0 records out
17179869184 bytes (17 GB, 16 GiB) copied, 206.949 s, 83.0 MB/s
then, I followed the instructions:
sudo mkswap /swapfile
But I get this error:
mkswap: cannot open /swapfile: No such file or directory
Then, I decided to resize my swap partition instead of swapfile. So I want to delete them. (I didn't create any before so I assume I can delete them all?)
I followed this:
https://askubuntu.com/questions/904628/default-17-04-swap-file-location
I tried:
$ cat /proc/swaps
$ grep swap /etc/fstab
But I get nothing from the first one. Output from the second one is:
total used free shared buff/cache
available
Mem: 11862 3498 1014 138 7349
7907
Swap: 0 0 0
I also tried (after reboot):
swapon -s
and get
Filename Type Size Used Priority
/dev/sdb3 partition 3905532 0 -2
I wonder that did I successfully create swapfiles? How do I delete them if I did?
swap
swap
edited Mar 27 at 16:08
DopeGhoti
46.9k56190
46.9k56190
asked Mar 26 at 15:57
Frank WangFrank Wang
233
233
1
Hello, our new contributor! Please read our guidelines, and maybe more important note: You should really really read properly what you are typing, there is no space for typos in Linux!
– Vlastimil
Mar 26 at 16:19
add a comment |
1
Hello, our new contributor! Please read our guidelines, and maybe more important note: You should really really read properly what you are typing, there is no space for typos in Linux!
– Vlastimil
Mar 26 at 16:19
1
1
Hello, our new contributor! Please read our guidelines, and maybe more important note: You should really really read properly what you are typing, there is no space for typos in Linux!
– Vlastimil
Mar 26 at 16:19
Hello, our new contributor! Please read our guidelines, and maybe more important note: You should really really read properly what you are typing, there is no space for typos in Linux!
– Vlastimil
Mar 26 at 16:19
add a comment |
3 Answers
3
active
oldest
votes
The first issue is that your first command created a file, swapfile
, in your current directory, and that your subsequent command(s) were explicitly referencing /swapfile
, a file called swapfile
in the root directory. If that was not your current working directory when you executed the first command, all of the subsequent commands would be referring to a file that is not there to operate upon.
If you got no output from cat /proc/swaps
, that indicates that either your system does not have procfs
running (unlikely), or that you currently have no active swap space configured.
The output you claim to get from grep swap /etc/fstab
makes no sense whatsoever. That looks like the output of free -m
(incidentally confirming that you have no active swap configured), not the partial contents of the filesystem table.
Your post-reboot swapon -s
(which as the manual states gives the same information as cat /proc/swaps
) indicates that at some point prior to your reboot, someone executed swapoff
.
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
1
You can indeed, or you canmv
it to where you intended it to be if you haven't already started over from the correct directory.
– DopeGhoti
Mar 28 at 15:34
add a comment |
You made a typo:
of=swapfile
should be
of=/swapfile
the guide creates the swap file in the root directory, whereas the command that you entered would have created a swap file in your current directory.
add a comment |
Delete the swapfile(s) by
sudo swapoff -v /?/swapfile
where /? represents the directory where you inadvertently created an extra swapfile.
sudo nano /etc/fstab
allows you to edit fstab where you can delete any reference to /?/swapfile
sudo rm /?/swapfile
deletes the spurious swapfile.
add a comment |
Your Answer
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
The first issue is that your first command created a file, swapfile
, in your current directory, and that your subsequent command(s) were explicitly referencing /swapfile
, a file called swapfile
in the root directory. If that was not your current working directory when you executed the first command, all of the subsequent commands would be referring to a file that is not there to operate upon.
If you got no output from cat /proc/swaps
, that indicates that either your system does not have procfs
running (unlikely), or that you currently have no active swap space configured.
The output you claim to get from grep swap /etc/fstab
makes no sense whatsoever. That looks like the output of free -m
(incidentally confirming that you have no active swap configured), not the partial contents of the filesystem table.
Your post-reboot swapon -s
(which as the manual states gives the same information as cat /proc/swaps
) indicates that at some point prior to your reboot, someone executed swapoff
.
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
1
You can indeed, or you canmv
it to where you intended it to be if you haven't already started over from the correct directory.
– DopeGhoti
Mar 28 at 15:34
add a comment |
The first issue is that your first command created a file, swapfile
, in your current directory, and that your subsequent command(s) were explicitly referencing /swapfile
, a file called swapfile
in the root directory. If that was not your current working directory when you executed the first command, all of the subsequent commands would be referring to a file that is not there to operate upon.
If you got no output from cat /proc/swaps
, that indicates that either your system does not have procfs
running (unlikely), or that you currently have no active swap space configured.
The output you claim to get from grep swap /etc/fstab
makes no sense whatsoever. That looks like the output of free -m
(incidentally confirming that you have no active swap configured), not the partial contents of the filesystem table.
Your post-reboot swapon -s
(which as the manual states gives the same information as cat /proc/swaps
) indicates that at some point prior to your reboot, someone executed swapoff
.
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
1
You can indeed, or you canmv
it to where you intended it to be if you haven't already started over from the correct directory.
– DopeGhoti
Mar 28 at 15:34
add a comment |
The first issue is that your first command created a file, swapfile
, in your current directory, and that your subsequent command(s) were explicitly referencing /swapfile
, a file called swapfile
in the root directory. If that was not your current working directory when you executed the first command, all of the subsequent commands would be referring to a file that is not there to operate upon.
If you got no output from cat /proc/swaps
, that indicates that either your system does not have procfs
running (unlikely), or that you currently have no active swap space configured.
The output you claim to get from grep swap /etc/fstab
makes no sense whatsoever. That looks like the output of free -m
(incidentally confirming that you have no active swap configured), not the partial contents of the filesystem table.
Your post-reboot swapon -s
(which as the manual states gives the same information as cat /proc/swaps
) indicates that at some point prior to your reboot, someone executed swapoff
.
The first issue is that your first command created a file, swapfile
, in your current directory, and that your subsequent command(s) were explicitly referencing /swapfile
, a file called swapfile
in the root directory. If that was not your current working directory when you executed the first command, all of the subsequent commands would be referring to a file that is not there to operate upon.
If you got no output from cat /proc/swaps
, that indicates that either your system does not have procfs
running (unlikely), or that you currently have no active swap space configured.
The output you claim to get from grep swap /etc/fstab
makes no sense whatsoever. That looks like the output of free -m
(incidentally confirming that you have no active swap configured), not the partial contents of the filesystem table.
Your post-reboot swapon -s
(which as the manual states gives the same information as cat /proc/swaps
) indicates that at some point prior to your reboot, someone executed swapoff
.
edited Mar 26 at 20:40
answered Mar 26 at 16:03
DopeGhotiDopeGhoti
46.9k56190
46.9k56190
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
1
You can indeed, or you canmv
it to where you intended it to be if you haven't already started over from the correct directory.
– DopeGhoti
Mar 28 at 15:34
add a comment |
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
1
You can indeed, or you canmv
it to where you intended it to be if you haven't already started over from the correct directory.
– DopeGhoti
Mar 28 at 15:34
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
Got it! I found the swapfile in ~/, since I didn't cd to any other directory. So can I just remove it with rm command? Thank you!
– Frank Wang
Mar 28 at 15:04
1
1
You can indeed, or you can
mv
it to where you intended it to be if you haven't already started over from the correct directory.– DopeGhoti
Mar 28 at 15:34
You can indeed, or you can
mv
it to where you intended it to be if you haven't already started over from the correct directory.– DopeGhoti
Mar 28 at 15:34
add a comment |
You made a typo:
of=swapfile
should be
of=/swapfile
the guide creates the swap file in the root directory, whereas the command that you entered would have created a swap file in your current directory.
add a comment |
You made a typo:
of=swapfile
should be
of=/swapfile
the guide creates the swap file in the root directory, whereas the command that you entered would have created a swap file in your current directory.
add a comment |
You made a typo:
of=swapfile
should be
of=/swapfile
the guide creates the swap file in the root directory, whereas the command that you entered would have created a swap file in your current directory.
You made a typo:
of=swapfile
should be
of=/swapfile
the guide creates the swap file in the root directory, whereas the command that you entered would have created a swap file in your current directory.
answered Mar 26 at 16:02
JShorthouseJShorthouse
52328
52328
add a comment |
add a comment |
Delete the swapfile(s) by
sudo swapoff -v /?/swapfile
where /? represents the directory where you inadvertently created an extra swapfile.
sudo nano /etc/fstab
allows you to edit fstab where you can delete any reference to /?/swapfile
sudo rm /?/swapfile
deletes the spurious swapfile.
add a comment |
Delete the swapfile(s) by
sudo swapoff -v /?/swapfile
where /? represents the directory where you inadvertently created an extra swapfile.
sudo nano /etc/fstab
allows you to edit fstab where you can delete any reference to /?/swapfile
sudo rm /?/swapfile
deletes the spurious swapfile.
add a comment |
Delete the swapfile(s) by
sudo swapoff -v /?/swapfile
where /? represents the directory where you inadvertently created an extra swapfile.
sudo nano /etc/fstab
allows you to edit fstab where you can delete any reference to /?/swapfile
sudo rm /?/swapfile
deletes the spurious swapfile.
Delete the swapfile(s) by
sudo swapoff -v /?/swapfile
where /? represents the directory where you inadvertently created an extra swapfile.
sudo nano /etc/fstab
allows you to edit fstab where you can delete any reference to /?/swapfile
sudo rm /?/swapfile
deletes the spurious swapfile.
answered Mar 26 at 18:43
K7AAYK7AAY
1,0221028
1,0221028
add a comment |
add a comment |
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-swap
1
Hello, our new contributor! Please read our guidelines, and maybe more important note: You should really really read properly what you are typing, there is no space for typos in Linux!
– Vlastimil
Mar 26 at 16:19