MacOS: What file does the command `last` get its information from?

Multi tool use
Multi tool use

The name of the pictureThe name of the pictureThe name of the pictureClash Royale CLAN TAG#URR8PPP











up vote
1
down vote

favorite












Can't seem to find where this last command gets its information from. Does anyone know what file it uses (specifically for Unix macOS) ?



Tried cat /var/log/wtmp, cat /var/run/utmp, cat /var/log/lastlog but all I get is: cat: [...]: No such file or directory . Tried cat /var/log/system.log and sudo cat /var/audit but these aren't it either. Is it just me or ? Where is this file ?






files find osx macintosh last







share|improve this question























  • What does man last say? On typical unix it is stored in /var/log/wtmp and on the FreeBSD I have handy it is /var/log/utx.log
    – Cupcake Protocol
    Sep 13 at 17:10











  • Doesn't say anything about what file it uses.
    – Lion
    Sep 13 at 17:12











  • dtruss is Mac's strace equivalent; you should be able to use dtruss to find this information.
    – Wildcard
    Sep 13 at 18:16










  • I think these are now stored in Apple SysLog (ASL) database files in /var/log/asl/*.
    – Christopher
    Sep 13 at 20:25














up vote
1
down vote

favorite












Can't seem to find where this last command gets its information from. Does anyone know what file it uses (specifically for Unix macOS) ?



Tried cat /var/log/wtmp, cat /var/run/utmp, cat /var/log/lastlog but all I get is: cat: [...]: No such file or directory . Tried cat /var/log/system.log and sudo cat /var/audit but these aren't it either. Is it just me or ? Where is this file ?






files find osx macintosh last







share|improve this question























  • What does man last say? On typical unix it is stored in /var/log/wtmp and on the FreeBSD I have handy it is /var/log/utx.log
    – Cupcake Protocol
    Sep 13 at 17:10











  • Doesn't say anything about what file it uses.
    – Lion
    Sep 13 at 17:12











  • dtruss is Mac's strace equivalent; you should be able to use dtruss to find this information.
    – Wildcard
    Sep 13 at 18:16










  • I think these are now stored in Apple SysLog (ASL) database files in /var/log/asl/*.
    – Christopher
    Sep 13 at 20:25












up vote
1
down vote

favorite









up vote
1
down vote

favorite











Can't seem to find where this last command gets its information from. Does anyone know what file it uses (specifically for Unix macOS) ?



Tried cat /var/log/wtmp, cat /var/run/utmp, cat /var/log/lastlog but all I get is: cat: [...]: No such file or directory . Tried cat /var/log/system.log and sudo cat /var/audit but these aren't it either. Is it just me or ? Where is this file ?






files find osx macintosh last







share|improve this question















Can't seem to find where this last command gets its information from. Does anyone know what file it uses (specifically for Unix macOS) ?



Tried cat /var/log/wtmp, cat /var/run/utmp, cat /var/log/lastlog but all I get is: cat: [...]: No such file or directory . Tried cat /var/log/system.log and sudo cat /var/audit but these aren't it either. Is it just me or ? Where is this file ?






files find osx macintosh last




files find osx macintosh last






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Sep 25 at 11:43









Sparhawk

8,53863489




8,53863489










asked Sep 13 at 17:06









Lion

957




957











  • What does man last say? On typical unix it is stored in /var/log/wtmp and on the FreeBSD I have handy it is /var/log/utx.log
    – Cupcake Protocol
    Sep 13 at 17:10











  • Doesn't say anything about what file it uses.
    – Lion
    Sep 13 at 17:12











  • dtruss is Mac's strace equivalent; you should be able to use dtruss to find this information.
    – Wildcard
    Sep 13 at 18:16










  • I think these are now stored in Apple SysLog (ASL) database files in /var/log/asl/*.
    – Christopher
    Sep 13 at 20:25
















  • What does man last say? On typical unix it is stored in /var/log/wtmp and on the FreeBSD I have handy it is /var/log/utx.log
    – Cupcake Protocol
    Sep 13 at 17:10











  • Doesn't say anything about what file it uses.
    – Lion
    Sep 13 at 17:12











  • dtruss is Mac's strace equivalent; you should be able to use dtruss to find this information.
    – Wildcard
    Sep 13 at 18:16










  • I think these are now stored in Apple SysLog (ASL) database files in /var/log/asl/*.
    – Christopher
    Sep 13 at 20:25















What does man last say? On typical unix it is stored in /var/log/wtmp and on the FreeBSD I have handy it is /var/log/utx.log
– Cupcake Protocol
Sep 13 at 17:10





What does man last say? On typical unix it is stored in /var/log/wtmp and on the FreeBSD I have handy it is /var/log/utx.log
– Cupcake Protocol
Sep 13 at 17:10













Doesn't say anything about what file it uses.
– Lion
Sep 13 at 17:12





Doesn't say anything about what file it uses.
– Lion
Sep 13 at 17:12













dtruss is Mac's strace equivalent; you should be able to use dtruss to find this information.
– Wildcard
Sep 13 at 18:16




dtruss is Mac's strace equivalent; you should be able to use dtruss to find this information.
– Wildcard
Sep 13 at 18:16












I think these are now stored in Apple SysLog (ASL) database files in /var/log/asl/*.
– Christopher
Sep 13 at 20:25




I think these are now stored in Apple SysLog (ASL) database files in /var/log/asl/*.
– Christopher
Sep 13 at 20:25










2 Answers
2






active

oldest

votes

















up vote
2
down vote













According to the manual (man last refers to man utmpx), /var/run/utmpx.






share|improve this answer




















  • man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
    – Lion
    Sep 13 at 17:49


















up vote
2
down vote













It used to be /var/log/wtmp before Mac OS 10.3, according to Apple header file commentary. That file no longer exists and is not used. The underlying C library functions for accessing the login database, upon which last is based, now talk to ASL.



Further reading



  • Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.





share|improve this answer




















    Your Answer







    StackExchange.ready(function()
    var channelOptions =
    tags: "".split(" "),
    id: "106"
    ;
    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',
    convertImagesToLinks: false,
    noModals: false,
    showLowRepImageUploadWarning: true,
    reputationToPostImages: null,
    bindNavPrevention: true,
    postfix: "",
    onDemand: true,
    discardSelector: ".discard-answer"
    ,immediatelyShowMarkdownHelp:true
    );



    );













     

    draft saved


    draft discarded


















    StackExchange.ready(
    function ()
    StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f468846%2fmacos-what-file-does-the-command-last-get-its-information-from%23new-answer', 'question_page');

    );

    Post as a guest

















    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    2
    down vote













    According to the manual (man last refers to man utmpx), /var/run/utmpx.






    share|improve this answer




















    • man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
      – Lion
      Sep 13 at 17:49















    up vote
    2
    down vote













    According to the manual (man last refers to man utmpx), /var/run/utmpx.






    share|improve this answer




















    • man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
      – Lion
      Sep 13 at 17:49













    up vote
    2
    down vote










    up vote
    2
    down vote









    According to the manual (man last refers to man utmpx), /var/run/utmpx.






    share|improve this answer












    According to the manual (man last refers to man utmpx), /var/run/utmpx.







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered Sep 13 at 17:13









    DopeGhoti

    41.3k55180




    41.3k55180











    • man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
      – Lion
      Sep 13 at 17:49

















    • man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
      – Lion
      Sep 13 at 17:49
















    man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
    – Lion
    Sep 13 at 17:49





    man utmpx only says this about the utmpx file. "Currently logged in users are tracked in /var/run/utmpx", whereas the last command displays the history of all login/outs since the file (that I'm looking for) was created. @DopeGhoti
    – Lion
    Sep 13 at 17:49













    up vote
    2
    down vote













    It used to be /var/log/wtmp before Mac OS 10.3, according to Apple header file commentary. That file no longer exists and is not used. The underlying C library functions for accessing the login database, upon which last is based, now talk to ASL.



    Further reading



    • Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.





    share|improve this answer
























      up vote
      2
      down vote













      It used to be /var/log/wtmp before Mac OS 10.3, according to Apple header file commentary. That file no longer exists and is not used. The underlying C library functions for accessing the login database, upon which last is based, now talk to ASL.



      Further reading



      • Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.





      share|improve this answer






















        up vote
        2
        down vote










        up vote
        2
        down vote









        It used to be /var/log/wtmp before Mac OS 10.3, according to Apple header file commentary. That file no longer exists and is not used. The underlying C library functions for accessing the login database, upon which last is based, now talk to ASL.



        Further reading



        • Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.





        share|improve this answer












        It used to be /var/log/wtmp before Mac OS 10.3, according to Apple header file commentary. That file no longer exists and is not used. The underlying C library functions for accessing the login database, upon which last is based, now talk to ASL.



        Further reading



        • Jonathan de Boyne Pollard (2018). The Unix login database. Frequently Given Answers.






        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Sep 14 at 0:16









        JdeBP

        29.7k461136




        29.7k461136



























             

            draft saved


            draft discarded















































             


            draft saved


            draft discarded














            StackExchange.ready(
            function ()
            StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f468846%2fmacos-what-file-does-the-command-last-get-its-information-from%23new-answer', 'question_page');

            );

            Post as a guest
































































            G5aSpaJJk,PWwwVGYnVr1,Vk9vKDF6cbwc3u1,fuk2E31d
            -
            yIAznTFBRXzs7 qOh0pB2M30vgtPTRKQ tA0qg6 w6Tl5t4Q,iv3TxOdB jBi7r8hP9S cY5XIukAtn,FJNfu zKMyCggJXWHHGju,Ai

            Popular posts from this blog

            How to check contact read email or not when send email to Individual?

            Image
            Clash Royale CLAN TAG #URR8PPP up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this question asked Sep 26 at 0:12 ToanLuong 49 9 add a comment  |  up vote 1 down vote favorite I'm using WordPress 4.9.8, CiviCRM to 5.5.1, I usually send email to contact by Search> Find contacts View contact details Action> Send email Send email ok, Contact received mail ok like picture But status only Email sent though contact read email or not. So, can CiviCRM can change status to Email read when contact read email? wordpress email share | improve this questi...
            Read more

            How many registers does an x86_64 CPU actually have?

            Image
            Clash Royale CLAN TAG #URR8PPP up vote 2 down vote favorite I am currently learning reverse engineering and am studying the flags register. I had in my mind that rflags was just another name for one of the 16 general purpose registers, for example rax or rbx . But it looks like rflags is actually an additional register. So that makes 17 registers in total... how many more could there be? I have spent at least an hour on this and found numerous different answers. The best answer so far is this, which says that there are 40 registers in total. 16 General Purpose Registers 2 Status Registers 6 Code Segment Registers 16 SSE Registers 8 FPU/MMX Registers But if I add that up, I get 48. Could anybody provide an official answer on how many registers an x86_64 CPU has (e.g. an Intel i7). Additionally, I have seen references to 'hardware' and 'architectural' registers. What are those registers and how many are there? register x86-64 share | improve this...
            Read more

            Displaying single band from multi-band raster using QGIS

            Image
            Clash Royale CLAN TAG #URR8PPP 1 How can I extract a single band from multi-band raster in QGIS? I have an remote sensed image which has 6 bands (including NDVI band), I want to display each band separately, but have no idea how to do. I have seen some questions similar here but none worked for me. The original image (has 6 bands) is: I want to display the band 6 which should be like this: But I tried gdal_translate, and couldn't get the correct result. What I have got is: qgis raster multi-band share | improve this question edited Mar 5 at 0:53 Summer asked Mar 4 at 6:42 Summer Summer 23 6 Is this any help gis.stackexchange.com/questions/220658/… ? if not gis.stackexchange.com/questions/62133/… might help. – Michael Stimson Mar 4 at 6:46 Thanks for answering but when I used gdal_translate, qgis showed that 'Error 4: Kayena.tif: No such file or directory". Would you know how to fi...
            Read more