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$ apt-get install purge-old-kernels The program 'purge-old-kernels' is currently not installed. You can install it by typing: apt install byobu "byobu

$ apt-get install purge-old-kernels The program 'purge-old-kernels' is currently not installed. You can install it by typing: apt install byobu "byobu"? packages.debian.org to the rescue... https://packages.debian.org/jessie/byobu https://packages.debian.org/jessie/byobu "Using Byobu, you can quickly create and move between different windows over a single SSH connection or TTY terminal, split each of those windows into multiple panes, monitor dozens of important statistics about your system, detach and reattach to sessions later while your programs continue to run in the background." Uhm... what?

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justinsaccount 10y ago
> "byobu"? packages.debian.org to the rescue... You don't ned to use packages.debian.org to look up what packages do. > apt show byobu .. Description: text window manager, shell multiplexer, integrated DevOps environment Byobu is Ubuntu's powerful text-based window manager, shell multiplexer, and integrated DevOps environment.
- deleted 10y ago
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- JdeBP 10y ago
  Quite right. One uses packages.ubuntu.com: * http://packages.ubuntu.com/yakkety/all/byobu/filelist http://packages.ubuntu.com/yakkety/all/byobu/filelist (-:
drostie 10y ago
byobu is basically an abstraction over screen and tmux, letting you use either with some common keybindings for spawning new windows and a common toolbar at the bottom telling you disk usage and load average and the like. I am not sure why purge-old-kernels is in the byobu package, that seems like a really poor placement for it.
- dustinkirkland 10y ago
  It is a bad place for it. But it's there because I wrote both of them, and Byobu is always everywhere I want it to be, and I generally always want purge-old-kernels there too. But yes, you're very right. It needs to be moved out.
  - alphapapa 10y ago
    Forgive the intrusion, just want to say thanks for Byobu. I use it regularly, and it's much nicer than bare tmux or screen.
    - dustinkirkland 10y ago
      :-) Thanks!
yorwba 10y ago
Are you sure you typed exactly that? For `apt-get install purge-old-kernels` I get E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root? And for `sudo apt-get install purge-old-kernels`, I get Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package purge-old-kernels But I can reproduce your error by `purge-old-kernels` alone. That is indeed strange. EDIT: I straced bash by `strace -o bashlog -f -s 10000 bash` and found the culprit to be /usr/lib/command-not-found. Indeed, if you run `/usr/lib/command-not-found -- purge-old-kernels` directly, you get that same message about byobu. EDIT2: I assumed this was some kind of bug with the database, but now I actually tried installing byobu and it does make purge-old-kernels available.
- pizza234 10y ago
  The first of the two errors has nothing to do with the package itself - packages need root permisions to be managed, which is what exactly the error is telling you: E: Unable to lock the administration directory (/var/lib/dpkg/), are you root? ^^^^^^^^^^^^^ In your case, you didn't prepend `sudo`. Regarding the second, which is instead the core of the problem, see the man page (http://manpages.ubuntu.com/manpages/xenial/man1/purge-old-kernels.1.html http://manpages.ubuntu.com/manpages/xenial/man1/purge-old-ke...): Provided by: byobu_5.106-0ubuntu1_all bug Therefore the correct (and full) command is: sudo apt-get install byobu As pointed out in another comment, such package is arguably a poor placement for this type of utility.
  - yorwba 10y ago
    I'm aware that the first errors don't have anything to do with the package itself, but this was the command line given. I was wondering what kind of setup might lead to an apt-get command (without sudo even) to display that error message.
    - pizza234 10y ago
dustinkirkland 10y ago
So I'm the author of both Byobu and purge-old-kernels. It's in Debian, because I help push it there after I push it to Ubuntu. It's completely wrong that purge-old-kernels is in Byobu, rather than in the kernel or directly handled by dpkg/apt. Thanks for all the feedback here -- we'll get that cleaned up in 17.10!

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justinsaccount 10y ago

> "byobu"? packages.debian.org to the rescue... You don't ned to use packages.debian.org to look up what packages do. > apt show byobu .. Description: text window manager, shell multiplexer, integrated DevOps environment Byobu is Ubuntu's powerful text-based window manager, shell multiplexer, and integrated DevOps environment.

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JdeBP 10y ago
Quite right. One uses packages.ubuntu.com: * http://packages.ubuntu.com/yakkety/all/byobu/filelist http://packages.ubuntu.com/yakkety/all/byobu/filelist (-:

drostie 10y ago

byobu is basically an abstraction over screen and tmux, letting you use either with some common keybindings for spawning new windows and a common toolbar at the bottom telling you disk usage and load average and the like. I am not sure why purge-old-kernels is in the byobu package, that seems like a really poor placement for it.

dustinkirkland 10y ago
It is a bad place for it. But it's there because I wrote both of them, and Byobu is always everywhere I want it to be, and I generally always want purge-old-kernels there too. But yes, you're very right. It needs to be moved out.
- alphapapa 10y ago
  Forgive the intrusion, just want to say thanks for Byobu. I use it regularly, and it's much nicer than bare tmux or screen.
  - dustinkirkland 10y ago
    :-) Thanks!

yorwba 10y ago

Are you sure you typed exactly that? For `apt-get install purge-old-kernels` I get E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) E: Unable to lock the administration directory (/var/lib/dpkg/), are you root? And for `sudo apt-get install purge-old-kernels`, I get Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package purge-old-kernels But I can reproduce your error by `purge-old-kernels` alone. That is indeed strange. EDIT: I straced bash by `strace -o bashlog -f -s 10000 bash` and found the culprit to be /usr/lib/command-not-found. Indeed, if you run `/usr/lib/command-not-found -- purge-old-kernels` directly, you get that same message about byobu. EDIT2: I assumed this was some kind of bug with the database, but now I actually tried installing byobu and it does make purge-old-kernels available.

pizza234 10y ago
The first of the two errors has nothing to do with the package itself - packages need root permisions to be managed, which is what exactly the error is telling you: E: Unable to lock the administration directory (/var/lib/dpkg/), are you root? ^^^^^^^^^^^^^ In your case, you didn't prepend `sudo`. Regarding the second, which is instead the core of the problem, see the man page (http://manpages.ubuntu.com/manpages/xenial/man1/purge-old-kernels.1.html http://manpages.ubuntu.com/manpages/xenial/man1/purge-old-ke...): Provided by: byobu_5.106-0ubuntu1_all bug Therefore the correct (and full) command is: sudo apt-get install byobu As pointed out in another comment, such package is arguably a poor placement for this type of utility.
- yorwba 10y ago
  I'm aware that the first errors don't have anything to do with the package itself, but this was the command line given. I was wondering what kind of setup might lead to an apt-get command (without sudo even) to display that error message.
  - pizza234 10y ago

dustinkirkland 10y ago

So I'm the author of both Byobu and purge-old-kernels. It's in Debian, because I help push it there after I push it to Ubuntu. It's completely wrong that purge-old-kernels is in Byobu, rather than in the kernel or directly handled by dpkg/apt. Thanks for all the feedback here -- we'll get that cleaned up in 17.10!