I knew a few of these but what I was looking for was the C key on boot to boot from an external drive:
Committing file deletes to Git
My normal git usage pattern is:
git add . git commit -m "commit message"
and then when needed:
git push remotename master
The trouble with ‘git add .’ is that is doesn’t stage any deleted files for committing. You can see this if you do a ‘git status’ and you’ll see it list deleted files, but listed as not staged:
$git status # On branch master # Changes not staged for commit: # (use "git add/rm" to update what will be committed) # deleted: ...
You’ll notice the comment mentions to use ‘git rm’ to delete files from the repo, but if you’ve deleted files locally, you can either do a ‘git rm filename’ for each of the locally deleted files, or more simply, do this to pick up all changed files for staging, including deletes:
git add -A
Configuring Ubuntu to access a wireless HP printer
hplip is an opensource project to support multiple HP printers on Linux. On Ubuntu 12.04 I already had this installed, but running ‘sudo hp-setup’ gave me this error:
kev@ubuntu:~$ sudo hp-setup HP Linux Imaging and Printing System (ver. 3.12.2) Printer/Fax Setup Utility ver. 9.0 Copyright (c) 2001-9 Hewlett-Packard Development Company, LP This software comes with ABSOLUTELY NO WARRANTY. This is free software, and you are welcome to distribute it under certain conditions. See COPYING file for more details. warning: Qt/PyQt 4 initialization failed. error: hp-setup requires GUI support (try running with --qt3). Also, try using interactive (-i) mode.
A quick Google turned up this post, and installing hplip-gui installed the missing libraries and got me up and running.
sudo apt-get install hplip-gui
Starting up hp-setup again and following the wizard to point to the IP of my printer was all I needed to get my printer working.
Spring Roo @RooEntity from 1.1.x replaced in 1.2.x
If you have an older Spring Roo project created from Spring Roo 1.1.x and you’re trying to imported it to a more recent STS version and/or trying to upgrade to a later 1.2.x version of Spring Roo, you may be seeing these errors:
RooEntity cannot be resolved to a type
@RooEntity was replaced in Spring Roo 1.2.x with @RooJpaActiveRecord. Replace this in all your Entity classes and you should be good to go.
This is discussed in this thread.
@RooJpaActiveRecord is covered in the docs here.