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Pages with category Unix

  • Since my last upgrade, I had many small things that went awry on my computer. From tsearch2 in a Postgres database to ownership of files to the following authentication problem:

    root@mycomputer:~# su - www-data
    su: Authentication service cannot retrieve authentication info
    (Ignored)
    www-data@mycomputer:~$
    

    Note that with su it ignores the fact. With cron it was not being ignored, so I'd get no work done!

  • My Story

    I have had this problem for a while now.

    On my server, I run X11 whenever I work with it. Otherwise, I quit X11 since it otherwises uses a lot of resources. This gives my users a much better experience (i.e. better browsing and a lot of it happen at night for me because I live in California and I have loads of hits from France, Algeria, Tunisia, Marocco, etc.)

    So... my wife and I both have a Unix account and we both start our own version of X11.

    Hers rarely get stuck, mine seems to get stuck once a week or once a month.

  • I have had a BIG problem with compiling zlib. Now I have my own normal configure.ac file, but the most important part of that compile was for me to find out how on Earth can you generate the dynamic library (.dll and .dll.a files) instead of the static library (.a only file)?!

  • Copying an entire partition to another when both are not of the exact same size (in blocks) can be tricky, especially if that partition includes special files such as /dev/hda and FIFOs.1

    Yet, there are several ways to do so:

    1. 1. Note that was the case especially in the 90's. As of today, things have come a long way and there are command line options one can use with the cp and tar instructions to copy pretty much anything. You will still have problems with some files such as locks, though. But you should not have to copy them!
  • The other day, I created the odbcpp library. When I tried to build it on my Mac OS/X 10.4 (Tiger) I got a problem with the dynamic libraries. Instead of a .dylib extension, I got... nothing at all! (this problem was also reported on 10.5) I was sure that it worked for me with other libraries I developed (such as my sswf library) and thus I decided that I was not going to be left alone. Well...

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  • Well... I knew that a firewall could generate a few problems, but this one, I did not expect!

    I just could not FTP anything from my FedoraCore box. I checked the source system firewall, tweaked all sorts of options in the vsftpd.conf file to no aval.

    The error I was getting was this:

  • Today I got an error 16 with GRUB on one of my machines. This had happened before so I did not worry too much. It is just quite annoying.

    A Ubuntu boot CD has a cool feature one can use to rescue such a system (i.e. re-install GRUB properly.) More or less, boot the CD, select the rescue mode, let it do its things for a moment (after you select options like keyboard, etc.)

  • 1) Getting the OS

    First go to http://www.ubuntu.com and get the latest version you're interesting in. They offer server version that they support for 5 years or so. I suggest one of those if you want to run a server. This is an ISO, in generate around 600Mb so be ready to wait a few hours... Even with a really fast connection, because the transfer will be limited by the mirror in most cases.

  • Well, first... what is RAID?

    Loads of very detailed info are available on Wikipedia. Just in case, it means: Redundant Array of Independent Disks.

Check this out!

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