Tom's questions

I have a Dell XPS 13 7390 that came with Ubuntu 18.04. It recently prompted me to upgrade to 20.04, so I did.

Some of my software, checks for updates when it starts, one example is DBeaver. I have found if I download a deb file for applications that existed before the upgrade, the "Ubuntu Software" GUI opens but with no install button, it only has a Remove button:

Before the upgrade, I would install new versions of my applications updates using a Install button in the "Ubuntu Software" GUI.

Anyone know a way to fix this and get back the Install button.

Notes:

• I tried removing the application and re-installing. This doesn't fix it, the next update is also missing the Install button, so updating is hard.
• I know I could try a different way of installing, e.g. dpkg on the CLI but I want to solve this problem without a workaround.

In Ubuntu 14.10, if I had multiple Terminal Tabs open, I could right-click a Terminal tab and rename it. In Ubuntu 15.04 I can't find this feature.

Is there a easy way to get it back?

This is the current version:

$ gnome-terminal --version
GNOME Terminal 3.14.2

After I upgraded to Ubuntu 13.10, the local development version of my website stopped working with a PHP warning:

include(SolrQuery.php): failed to open stream: No such file or directory

I checked the pecl solr extension is installed:

> sudo pecl install solr
pecl/solr is already installed and is the same as the released version 1.0.2

I checked the Solr Apache extension is set up:

> cat /etc/php5/apache2/conf.d/solr.ini
extension=solr.so

Any idea where the problem could be?

The command php -m doesn't seem to show solr.

I'm using the "WP super cache" WordPress plugin on a Ubuntu 12.04 server and found it is incompatible with php APC.

After installing and activating the WordPress plugin, the blog was down and users were getting a error page:

HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfil the request.

I noticed a segmentation fault in the Apache error log (/var/log/apache2/error.log).

In the troubleshooting section of the WP super cache FAQ I noticed a description of my problem:

1. The "white screen of death" or a blank page when you visit your site is almost always caused by a PHP error but it may also be caused by APC. Disable that PHP extension if you have trouble and replace with eAccelerator or Xcache.

So I commented out the apc Apache extension and restarted Apache:

> sudo emacs /etc/php5/apache2/conf.d/apc.ini 
;extension=apc.so
> sudo service apache2 restart

Sure enough, that fixed the problem - the blog was back up and caching enabled.

The thing is, I actually want APC cache to run as well. The opcode cache is useful. I know I could use another opcode cache but does anyone know a APC setting I can change to allow this plugin to work with APC?

Note: I also tried Ubuntu 10.10, 11.04, 11.10 and had exactly the same issue.

Today I did a fresh install of ubuntu 12.04 and went about setting up my local development environment. I installed mysql and edited /etc/mysql/my.cnf to optimise InnoDB but when I try to restart mysql, it fails with a error:

[20:53][tom@Pochama:/var/www/website] (master) $ sudo service mysql restart
start: Job failed to start

The syslog reveals there is a problem with the init script:

> tail -f /var/log/syslog

Apr 28 21:17:46 Pochama kernel: [11840.884524] type=1400 audit(1335644266.033:184): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=760 comm="apparmor_parser"
Apr 28 21:17:47 Pochama kernel: [11842.603773] init: mysql main process (764) terminated with status 7
Apr 28 21:17:47 Pochama kernel: [11842.603841] init: mysql main process ended, respawning
Apr 28 21:17:48 Pochama kernel: [11842.932462] init: mysql post-start process (765) terminated with status 1
Apr 28 21:17:48 Pochama kernel: [11842.950393] type=1400 audit(1335644268.101:185): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=811 comm="apparmor_parser"
Apr 28 21:17:49 Pochama kernel: [11844.656598] init: mysql main process (815) terminated with status 7
Apr 28 21:17:49 Pochama kernel: [11844.656665] init: mysql main process ended, respawning
Apr 28 21:17:50 Pochama kernel: [11845.004435] init: mysql post-start process (816) terminated with status 1
Apr 28 21:17:50 Pochama kernel: [11845.021777] type=1400 audit(1335644270.173:186): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=865 comm="apparmor_parser"
Apr 28 21:17:51 Pochama kernel: [11846.721982] init: mysql main process (871) terminated with status 7
Apr 28 21:17:51 Pochama kernel: [11846.722001] init: mysql respawning too fast, stopped

Any ideas?

Things I tried already:

I googled and found a Ubuntu bug with apparmor (https://bugs.launchpad.net/ubuntu/+source/mysql-5.5/+bug/970366), I changed apparmor from enforce mode to complain mode:

sudo apt-get install apparmor-utils
sudo aa-complain /usr/sbin/mysqld
sudo /etc/init.d/apparmor reload

but it didn't help. I still can't start mysql.

I also thought the issue may be because the InnoDB logfiles were a different size than mysql was expecting. I removed the innodb log files before restarting using: sudo mv /var/lib/mysql/ib_logfile* /tmp. No luck though.

Workaround: I re-installed 12.04, made sure not to touch /etc/mysql/my.cnf in any way. Mysql is working so I can get on with what I need to do. But I will need to edit it at some point - Hopefully I'll have figured out a solution, or this question will have been answered by that point...

When I installed Ubuntu 11.04, I created a separate home partition. I have just installed Ubuntu 11.10. In the installation screen The options were:

1. Erase Ubuntu 11.04 and reinstall
2. Upgrade Ubuntu 11.04 to 11.10
3. Erase everything and reinstall
4. Something else

I chose the option called "Erase Ubuntu 11.04 and reinstall".

Now that installation has finished, I have logged in but everything is fresh, my home partition was ignored or not recognized. So Opps... I must have choosen the wrong installation type from the menu - Doh!

Luckily, there is a glimmer of hope because I can see the old home partition in nautilus complete with my old home data and i can see the partition in sudo fdisk -l.

How can I recover my old home partition so that the new 11.10 uses it and everything is back to normal?

Should I re-install but choose a different option? Or is there some command line fu I can use to get me back up and running?

I have a Dell XPS L702x Laptop and after upgrading from 11.04 to 11.10, my wireless no longer works. I'm using a Ethernet cable to get online to ask this question.

> iwconfig
lo        no wireless extensions.

eth0      no wireless extensions.


> lspci -v
...
3:00.0 Network controller: Intel Corporation Centrino Wireless-N 1000
        Subsystem: Intel Corporation Centrino Wireless-N 1000 BGN
        Flags: bus master, fast devsel, latency 0, IRQ 6
        Memory at d7400000 (64-bit, non-prefetchable) [size=8K]
        Capabilities: [c8] Power Management version 3
        Capabilities: [d0] MSI: Enable- Count=1/1 Maskable- 64bit+
        Capabilities: [e0] Express Endpoint, MSI 00
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [140] Device Serial Number 8c-a9-82-ff-ff-89-12-c6
        Kernel modules: iwlagn
...

Anyone know a fix?

(yes, I have tried Fn+F2, to switch on wireless).

I'm trying to create a zip file from a folder and I'd like to exclude the .git sub-folder from the resulting zip file.

I have gone to the parent folder of the one I want to zip (called bitvolution) and I'm doing:

zip -r bitvolution.zip bitvolution -x ".git"

But it doesn't exclude the .git sub-folder.

I've tried various combinations, -x .git*, -x \.git/*, -x .git/\*, -x \.git/\*. I've also tried using the full path for the exclude argument... but just didn't get there.