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wintersolutions's questions

Martin Hope
wintersolutions
Asked: 2013-03-16 14:15:17 +0800 CST
  • 2

The URL for my printer generated by hp-makeuri looks like this:

hp:/net/Officejet_6500_E710n-z?ip=192.168.178.30

But the printer is on a dhcp enabled wifi network and so its IP-address does and could change. On the other hand my wifi router seems smart enough to have some sort of DNS:

$ ping hp-6500a
PING hp-6500a.fritz.box (192.168.178.30) 56(84) bytes of data.
64 bytes from hp-6500a.fritz.box (192.168.178.30): icmp_req=1 ttl=255 time=11.3 ms

I tried to use the hostname in the CUPS URL/DeviceUID but it failed, any suggestions if this is possible and the correct format?

printing
Martin Hope
wintersolutions
Asked: 2012-03-14 10:54:14 +0800 CST
  • 3

I'm always having trouble with RVM installs and non-interactive vs. interactive shell sessions. If the session isn't interactive I'm usually getting the command not found error on different programs/functions in the RVM/Ruby toolchain (i.e. gem, rvm, ruby etc.). There are three solutions to the issue I'm aware of:

  • Add/remove some lines from .bashrc for each user. The changes depend on the version of Ubuntu
  • Typing bash --login before working with RVM to get a interactive shell
  • Changing the 'Run command as login shell' option in gnome-terminal

All those solutions aren't exactly what I'm looking for because I have a couple of hosts with different versions of Ubuntu and for some applications the solutions outlined above don't work (i.e. daemonized Chef configuration management suite). As far as I could trace the problem down this is based on the fact that shell scripts in /etc/profile.d are only run if the user logs into a interactive shell session. Which seems not to be the case if a daemonized process runs or if I or an application logs in trough ssh.

What I'm basically searching for is a way to unify all different kinds of shell sessions to execute scripts in /etc/profile.d. Ideally this solution should work for all users that are able to login, and for different versions of Ubuntu (atm in use: 10.4, 11.10). It would also be good if it could be easily be set up using automated scripts or Chef recipes.

As a note: I don't know if not-running scripts in /etc/profile.d is the sole problem I'm facing, I know tough that doing a bash --login usually fixes my issues.

command-line login session ruby rvm
Martin Hope
wintersolutions
Asked: 2012-02-01 12:16:38 +0800 CST
  • 18

Because my internet connection is very unstable at the moment, I'd like to use a small indicator applet for the Unity panel.

Since I'm connected through a WLAN/Wifi Router, I can see in the network-applet when the connection to the router is lost, but not when the router loses the connection to the Internet.

A Windows 7 computer of mine has this functionality. It shows a black exclamation mark on yellow ground if it can't "ping" a remote server.

I'm running Ubuntu 11.10 "Oneiric Ocelot" 64-Bit with Unity 3D.

unity indicator connection