Setting correct size for “cryptsetup: WARNING: Option 'size' missing in crypttab for plain dm-crypt mapping...












0















I have a full disk encryption using ecryptfs, after upgrading to 18.10 a warning message started to appearing at boot:




cryptsetup: WARNING: Option 'size' missing in crypttab for plain
dm-crypt mapping root. Please read /usr/share/doc/cryptsetup/README.initramfs and add the correct 'size'
option to your crypttab(5).




From what I see at /usr/share/doc/cryptsetup-initramfs/README.initramfs.gz I should edit /etc/cryptsetup and set the correct size, but how should this size be calculated for my system?



This is the content of /etc/crypttab:



 cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64









share|improve this question



























    0















    I have a full disk encryption using ecryptfs, after upgrading to 18.10 a warning message started to appearing at boot:




    cryptsetup: WARNING: Option 'size' missing in crypttab for plain
    dm-crypt mapping root. Please read /usr/share/doc/cryptsetup/README.initramfs and add the correct 'size'
    option to your crypttab(5).




    From what I see at /usr/share/doc/cryptsetup-initramfs/README.initramfs.gz I should edit /etc/cryptsetup and set the correct size, but how should this size be calculated for my system?



    This is the content of /etc/crypttab:



     cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64









    share|improve this question

























      0












      0








      0








      I have a full disk encryption using ecryptfs, after upgrading to 18.10 a warning message started to appearing at boot:




      cryptsetup: WARNING: Option 'size' missing in crypttab for plain
      dm-crypt mapping root. Please read /usr/share/doc/cryptsetup/README.initramfs and add the correct 'size'
      option to your crypttab(5).




      From what I see at /usr/share/doc/cryptsetup-initramfs/README.initramfs.gz I should edit /etc/cryptsetup and set the correct size, but how should this size be calculated for my system?



      This is the content of /etc/crypttab:



       cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64









      share|improve this question














      I have a full disk encryption using ecryptfs, after upgrading to 18.10 a warning message started to appearing at boot:




      cryptsetup: WARNING: Option 'size' missing in crypttab for plain
      dm-crypt mapping root. Please read /usr/share/doc/cryptsetup/README.initramfs and add the correct 'size'
      option to your crypttab(5).




      From what I see at /usr/share/doc/cryptsetup-initramfs/README.initramfs.gz I should edit /etc/cryptsetup and set the correct size, but how should this size be calculated for my system?



      This is the content of /etc/crypttab:



       cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64






      encryption 18.10 ecryptfs cryptsetup






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 13 at 21:23









      marcanuymarcanuy

      259315




      259315






















          1 Answer
          1






          active

          oldest

          votes


















          0














          Add the size like size=256 to /etc/crypttab configuration:



          cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64,size=256





          share|improve this answer























            Your Answer








            StackExchange.ready(function() {
            var channelOptions = {
            tags: "".split(" "),
            id: "89"
            };
            initTagRenderer("".split(" "), "".split(" "), channelOptions);

            StackExchange.using("externalEditor", function() {
            // Have to fire editor after snippets, if snippets enabled
            if (StackExchange.settings.snippets.snippetsEnabled) {
            StackExchange.using("snippets", function() {
            createEditor();
            });
            }
            else {
            createEditor();
            }
            });

            function createEditor() {
            StackExchange.prepareEditor({
            heartbeatType: 'answer',
            autoActivateHeartbeat: false,
            convertImagesToLinks: true,
            noModals: true,
            showLowRepImageUploadWarning: true,
            reputationToPostImages: 10,
            bindNavPrevention: true,
            postfix: "",
            imageUploader: {
            brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
            contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
            allowUrls: true
            },
            onDemand: true,
            discardSelector: ".discard-answer"
            ,immediatelyShowMarkdownHelp:true
            });


            }
            });














            draft saved

            draft discarded


















            StackExchange.ready(
            function () {
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1109463%2fsetting-correct-size-for-cryptsetup-warning-option-size-missing-in-crypttab%23new-answer', 'question_page');
            }
            );

            Post as a guest















            Required, but never shown

























            1 Answer
            1






            active

            oldest

            votes








            1 Answer
            1






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            0














            Add the size like size=256 to /etc/crypttab configuration:



            cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64,size=256





            share|improve this answer




























              0














              Add the size like size=256 to /etc/crypttab configuration:



              cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64,size=256





              share|improve this answer


























                0












                0








                0







                Add the size like size=256 to /etc/crypttab configuration:



                cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64,size=256





                share|improve this answer













                Add the size like size=256 to /etc/crypttab configuration:



                cryptswap1 UUID=1d1XXXXXXXXXXXX /dev/urandom swap,offset=1024,cipher=aes-xts-plain64,size=256






                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered Jan 13 at 21:24









                marcanuymarcanuy

                259315




                259315






























                    draft saved

                    draft discarded




















































                    Thanks for contributing an answer to Ask Ubuntu!


                    • Please be sure to answer the question. Provide details and share your research!

                    But avoid



                    • Asking for help, clarification, or responding to other answers.

                    • Making statements based on opinion; back them up with references or personal experience.


                    To learn more, see our tips on writing great answers.




                    draft saved


                    draft discarded














                    StackExchange.ready(
                    function () {
                    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1109463%2fsetting-correct-size-for-cryptsetup-warning-option-size-missing-in-crypttab%23new-answer', 'question_page');
                    }
                    );

                    Post as a guest















                    Required, but never shown





















































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown

































                    Required, but never shown














                    Required, but never shown












                    Required, but never shown







                    Required, but never shown







                    Popular posts from this blog

                    How to reconfigure Docker Trusted Registry 2.x.x to use CEPH FS mount instead of NFS and other traditional...

                    is 'sed' thread safe

                    How to make a Squid Proxy server?