I have a Mac (OS X) and a VirtualBox running Ubuntu.
I want to SCP a 500mb file from the Mac to the VirtualBox. How do I do this? (Probably something to do with /etc/hosts?)
I have 2 different versions of PostgreSQL installed on my system (Ubuntu Lucid):
- /var/lib/postgresql/8.4
- /var/lib/postgresql/9.0
By default, when I run a PostgreSQL command such as createdb or psql, the 9.0 version is used.
How do I configure my system to use the 8.4 version by default instead?
I'm following the Nagios Ubuntu quickstart instructions. I'm on Ubuntu 10.10 and installing Nagios 3.2.3.
At the bottom of the docs it says I need to install the mailx and postfix packages. (Postfix is already installed.) But when I try to install mailx, I get asked which of 3 packages to install:
$ sudo apt-get install mailx
[sudo] password for nagios:
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package mailx is a virtual package provided by:
mailutils 1:2.1+dfsg1-4ubuntu1
heirloom-mailx 12.4-1.1
bsd-mailx 8.1.2-0.20090911cvs-2ubuntu1
You should explicitly select one to install.
E: Package mailx has no installation candidate
Which one should I install?
While trying to install Nagios 3.2.3, I ran their ./configure script and got these errors:
checking for main in -liconv... no
checking for gdImagePng in -lgd (order 1)... no
checking for gdImagePng in -lgd (order 2)... no
checking for gdImagePng in -lgd (order 3)... no
checking for gdImagePng in -lgd (order 4)... no
*** GD, PNG, and/or JPEG libraries could not be located... *********
Boutell's GD library is required to compile the statusmap, trends
and histogram CGIs. Get it from http://www.boutell.com/gd/, compile
it, and use the --with-gd-lib and --with-gd-inc arguments to specify
the locations of the GD library and include files.
NOTE: In addition to the gd-devel library, you'll also need to make
sure you have the png-devel and jpeg-devel libraries installed
on your system.
NOTE: After you install the necessary libraries on your system:
1. Make sure /etc/ld.so.conf has an entry for the directory in
which the GD, PNG, and JPEG libraries are installed.
2. Run 'ldconfig' to update the run-time linker options.
3. Run 'make clean' in the Nagios distribution to clean out
any old references to your previous compile.
4. Rerun the configure script.
NOTE: If you can't get the configure script to recognize the GD libs
on your system, get over it and move on to other things. The
CGIs that use the GD libs are just a small part of the entire
Nagios package. Get everything else working first and then
revisit the problem. Make sure to check the nagios-users
mailing list archives for possible solutions to GD library
problems when you resume your troubleshooting.
********************************************************************
Which package do I want? libgd2-xpm-dev? libgd2-noxpm-dev? php5-gd? I'm not looking to do any image processing myself - I just want to get Nagios working.
I want to automatically create a directory called ".virtualenvs" in each new user's home directory upon creation of that new user.
I am using the useradd command to create new users.
I want every new user from now on to have bash as their shell by default.
I know that to change your own shell to bash, you would use the command "chsh -s /bin/bash", but how do I automatically set all future users' shell to bash by default?
I'd like to do something like
$ play filename.mid
and hear the midi file played without opening up a graphical program. Is there a package for Ubuntu that can do this?
In /etc/sudoers I see this:
# Allow members of group sudo to execute any command after they have
# provided their password
# (Note that later entries override this, so you might need to move
# it further down)
%sudo ALL=(ALL) ALL
So how do I add a user to that sudo group?