Nick's questions

I'm building a re-branded Firefox from the source for version 51 stable. I would like to be able to package the compiled binary as a .deb and have it work on several different Linux distributions including Ubuntu 14+ and Mint/Mate 16-18.

I compiled it on a Mint 18 machine and it runs fine there, but trying to run it on a Ubuntu 16.04 or Mate 17 machine produces:

XPCOMGlueLoad error for file /opt/myapp/lib/myapp-51.0.2/libxul.so:
/opt/myapp/lib/myapp-51.0.2/libxul.so: symbol _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED1Ev, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference
Couldn't load XPCOM.

All the machines are 64 bit architecture, so I'm assuming this is an issue with library versions? I'm pretty sure there's an option that just bakes in dependencies rather than linking to the system version, but it's really hard to find any information on building Firefox beyond the most basic process.

How can I build a Firefox binary that runs on all modern Ubuntu-based 64bit Linux systems?

I'm creating a .deb package for an application (not for public distribution) and want to have an icon for the application for the taskbar, menu, dock, etc. My application's .desktop file has a line to specify icons, like:

Icon=preferences-desktop-keyboard

But how and where do you actually create a new icon?

Let's say I wanted to take an existing icon like the ImageMagick icon shown in /usr/share/applications/ImageMagick. The display.im6.desktop file (which is what actually opens when you try to edit /usr/share/applications/ImageMagick) has the line Icon=display.im6.

Ok, great. Since there's no full path, how do I find the graphics file for display.im6? What format is it in? Or are these dynamic files where there's a set of them for different sizes?

Then, I assume I can edit it/them in either GIMP or Inkscape?

Now, what format do I export it as, and to where? And do I need to create some type of meta file so that I can add a line to my application's launcher that reads Icon=myicon and the system will know where to get the icon from?

Update

locate display.im6 shows about 15 entries. There seems to be two themes, and a bunch of different sizes including one called scalable. I can't create an icon for each theme the user might have, so I guess I need to create a default icon somewhere? Or do I need a set of them in all the sizes? Or can I just create a scalable file and it will figure it out?

Update 2

I used locate to find an existing icon in .svg format and edited in inkscape. I tried adding it to the .desktop file with the full path:

Icon=/opt/myapp/lib/myapp-51.0.2/icons/myapp.svg

And the .desktop file has this icon now, but when you install the .desktop launcher into /usr/share/applications/ the luancher on the main menu has a red "missing icon" icon.

so I'm still not sure how you create a specify an icon stack with the different file formats and sizes and where those files get placed, and how you attach the set to the .desktop file.

I have uglifyjs, it works great. I want to get uglifycss going, but I'm running into problems.

I don't remember how I installed uglifyjs, but uglifycss wants to use npm.

So I installed npm:

apt-get install npm

Then installed uglifycss:

npm install uglifycss -g

And now you're supposed to be able to invoke it with:

uglifycss [options] [filename] [...] > output

But I get the error:

/usr/bin/env: node: No such file or directory

The command which uglifycss produces:

/usr/local/bin/uglifycss

Invoking it with the full path:

/usr/local/bin/uglifycss

Produces the same error:

/usr/bin/env: node: No such file or directory

So something isn't quite configured right, but I must have node.js installed and working because uglifyjs depends on it and that one works. What am I missing here?

For any given file in the web root, the permissions are initially set to me:www-data with chmod 750. Opening a file in an editor and saving via the editors save command changes the group to me:me. How do I prevent group changes on save?

Background: I had an NFS server, ran fine for years, needed to hard reboot it, and now I cannot get the daemon to stop when it's told to. Also, clients can't mount it any more, but I suspect the problem is whatever is preventing the daemon from stopping.

When I run:

service nfs-kernel-server stop

It says:

 * Stopping NFS kernel daemon                                                                        [ OK ] 
 * Unexporting directories for NFS kernel daemon...                                                  [ OK ] 

Then I run:

service nfs-kernel-server status

and it says:

nfsd running

So it doesn't appear to be stopping the service. Also, running stop multiple times does not produce an error- it just says it Stopping NFS kernel daemon each time I run the stop command.

When it is supposedly stopped, ps aux | grep nfsd shows:

root       761  0.0  0.0      0     0 ?        S<   Apr04   0:00 [nfsd4]
root       762  0.0  0.0      0     0 ?        S<   Apr04   0:00 [nfsd4_callbacks]
root       763  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]
root       764  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]
root       765  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]
root       766  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]
root       767  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]
root       768  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]
root       769  0.0  0.0      0     0 ?        D    Apr04   0:00 [nfsd]

So it appears that the stop command isn't actually stopping the daemon and processes. Why?

In Xubuntu, how do I remove a startup application that was set in Menu –> Setting –> Settings Manager –> Sessions and Startup without using the GUI? My startup command breaks the gui, and I need to disable it using the command line.

I have a 10.04 desktop that has FireFox 13 installed. Whenever a new version came out it was updating, but after switching the sources list to the archive sources for 10.04 end of life, apt-get claims that FireFox is the latest version. My other 10.04 machines are running 17.

There was a PPA for the latest stable firefox, but I can't seem to find it any-more and some articles suggest it may have been discontinued?

What is the preferred way of keeping Firefox updated on EOL 10.04?

I have a computer (10.04) that was previously running Thunderbird 12.0.1 just fine (installed via apt-get via official PPA). I don't know what happened at the time the problem started since this is a multi-user computer and I was not here. However, every time we try to launch TB, we immediately get a dialog that says:

We're Sorry
Thunderbird had a problem and crashed.

Things I've tried:

• Running thunderbird from a terminal produces no output.
• I tried apt-get remove thunderbird --purge and then reinstalled
• Deleting the user's .thunderbird folder and launching still results in a crash
• Attempting to run thunderbird -safe-mode still results in a crash
• This problem occurs for all users of Thunderbird on this computer.

Is there any way to get more details on why the program is crashing? For example, the specific error that TB is encountering? I tried thunderbird -g but I'm not sure what to do with the debugger.

UPDATE

apt-cache policy thunderbird

thunderbird:
  Installed: 12.0.1+build1-0ubuntu0.10.04.1
  Candidate: 12.0.1+build1-0ubuntu0.10.04.1
  Version table:
 *** 12.0.1+build1-0ubuntu0.10.04.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
        500 http://security.ubuntu.com/ubuntu/ lucid-security/main Packages
        100 /var/lib/dpkg/status
     11.0.1+build1-0ubuntu0.10.04.1~mts1 0
        500 http://ppa.launchpad.net/mozillateam/thunderbird-stable/ubuntu/ lucid/main Packages
     3.0.4+nobinonly-0ubuntu4 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages

This indicates that there is a cyrus-sasl2 package, but it doesn't appear to be available in the repositories?

I need to install Cyrus SASL for use with postfix, not the Cyrus IMAP server.

How do I install cyrus-sasl on a 10.04 Server?

I had a working Ubuntu 10.04 desktop with ATI drivers with three monitors on a Radion HD 5750.

After a standard apt-get update; apt-get upgrade; reboot

I got a black screen (system booted, but graphics did not display at login screen). I went into recovery mode and reset to basic graphics mode.

Currently, the Catalyst control center says the ATI driver is not installed. But the "hardware drivers" tool (jockey) says "ATI Fire GL" is installed and in use.

So either: 1. The driver is not actually installed even though jockey claims it is, or 2. The driver is installed but catalyst can't find/use it.

I used apt-get to purge and then reinstall the ATI drivers with no improvement.

How do I get this driver working again? Is there a way to completely purge/remove everything graphics related and start over like a clean system, but without an OS reinstall?

I have a 10.04 workstation that was running Compiz with Restricted nVidia drivers. I setup PAM to use LDAP authentication and mounted /home on NFS.

I can now login via LDAP with NFS homes, but my restricted drivers are gone, and the Hardware Drivers tool doesn't show any restricted drivers as being available. How do I get restricted drivers working again?

Possible Duplicate:
How do I install Java?

I'm trying to install sun-java6-plugin. It supposedly in the "partner" repo.

I have:

deb http://archive.canonical.com/ lucid partner

in /etc/apt/sources.list and ran apt-get update.

I get:

apt-get install sun-java6-plugin sun-java6-fonts
Reading package lists... Done
Building dependency tree       
Reading state information... Done    
Package sun-java6-plugin is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package sun-java6-plugin has no installation candidate

Does the package no longer exist, or do I need a different repo?

I have a user profile all setup with all settings the way I want them. I want to copy the entire configured profile to a new user account.

This is what I'm doing (user is already added to system):

1. Log out, switch to terminal, service gdm stop.
2. mkdir /home/newuser
3. cp -a /home/olduser/* /home/newuser/
4. chown newuser:newuser /home/newuser -R
5. service gdm start

Then I log in as newuser. When I log in, the desktop looks like a brand new user profile and not the customized profile that I copied.

I want everything in the new profile. The theme, where the docks are located and configured, desktop icons, Firefox favorites, etc.

Any idea why this isn't working? I am using Ubuntu 10.04