Most of this will work on any Linux distribution, but some commands are Ubuntu Linux specific. Get Ubuntu server version: cat /etc/lsb-release Empty Ubuntu Gnome Trash from the Command Line: rm -rf ~/.Trash/* Kill user’s processes and logout the user: sudo pkill -u username extract tar / tar.gz files: To only extract .tar files: tar [...]
Part 1: Part 2: part 3: The project code: asm1
Some mySQL commands you want to keep under you hand. Connecting to a mySQL server: mysql -h host_address -u user -p Viewing all the databases: show databases; Select a database to use: use mydatabase; show db tables (db must be selected): show tables; describe the table content: describe new_table; Selecting all the users in the [...]
watch here: In this tutorial I used the Notepad++ application, that can be found here.
When creating a window based application in Xcode4, it usually create an unwanted nib file that represents the default clear white window. Note: your class names will probably be different then mine, try to keep up, it not that hard. Some times we want to remove it and replace it with are own view controller, [...]
This is a simple Serial reader. You can select the port and start listening on it. Most useful for RFID readers. Download here.
Auto login is a small utility I wrote to enable users to automatically login to there winXP machine. The current user need only to enter his password, and that’s all. Note:this was not tested on Win7. Download.
The problem? Unity does not show the notification panel. This is a big issue, since some applications reside only there,and without this applet, we can’t call them back after starting them, close them or configure them (yes, we can kill them, but this is something else). we are going to use the command for this [...]
If you want to have unity on, but you want to have the menu for each window independent, you need to remove the indicator-appmenu package: sudo apt-get remove indicator-appmenu This will leave unity on, while enabling regular window menu. If you want to set it per application, please visit here.
Get Ubuntu server version:
cat /etc/lsb-releaseEmpty Ubuntu Gnome Trash from the Command Line:
rm -rf ~/.Trash/*
Kill user’s processes and logout the user:
sudo pkill -u username
extract tar / tar.gz files:
To only extract .tar files:
tar xvf archivename.tar
Most of the time, however the archive will probably will be in gzip format as well (tar.gz) so to extract this you can use:
tar xvfz archivename.tar.gz
to extract only some items:
tar xvzf archivename.tar.gz */item.you.want/*
if you encountered with the bz2 extension then you need bzip2 (usually installed) program and this command:
tar yxf archivename.tar.bz2
Change file mode
You need to use the chmod command:
http://www.computerhope.com/unix/uchmod.htm
Connecting to a mySQL server:
mysql -h host_address -u user -p
Viewing all the databases:
show databases;
Select a database to use:
use mydatabase;
show db tables (db must be selected):
show tables;
describe the table content:
describe new_table;
Selecting all the users in the system:
select host, user, password from mysql.user;
Creating a user:
CREATE USER 'monty'@'localhost' IDENTIFIED BY 'some_pass';
where you can omit theIDENTIFIED BY if password is not required (but it usually is).
Deleting a user:
DROP USER user;
Assigning a password:
UPDATE mysql.user SET Password=PASSWORD('newpass')
WHERE User='bob' AND Host='%.loc.gov';
FLUSH PRIVILEGES;
or
GRANT USAGE ON *.* TO 'bob'@'%.loc.gov' IDENTIFIED BY 'newpass';
grant privileges:
GRANT ALL PRIVILEGES ON *.* TO 'monty'@'%'
where you can replace ALL PRIVILEGES with any privilege that you like.
Revoking privileges:
revoke all privileges on databasename.* from user;
again, you can replace ALL PRIVILEGES with any privilege that you like.
Show user privileges:
show grants for 'user'@'host';
Clean table – this will remove all the records in the table. unlike the Delete command, this will also reset any counters on the table.
TRUNCATE TABLE tablename;
watch here:
In this tutorial I used the Notepad++ application, that can be found here.
When creating a window based application in Xcode4, it usually create an unwanted nib file that represents the default clear white window.
Note: your class names will probably be different then mine, try to keep up, it not that hard.
Some times we want to remove it and replace it with are own view controller, here is how:
Now it’s working
NSStringFromClass gives a string… from the class. which is what this function requires, in case there is no nib file that loads that data for us.
This is a simple Serial reader. You can select the port and start listening on it.
Most useful for RFID readers.
Download here.
Auto login is a small utility I wrote to enable users to automatically login to there winXP machine. The current user need only to enter his password, and that’s all.
Note:this was not tested on Win7.
The problem? Unity does not show the notification panel. This is a big issue, since some applications reside only there,and without this applet, we can’t call them back after starting them, close them or configure them (yes, we can kill them, but this is something else).
we are going to use the command for this – there is an options for GUI, but it’s simpler.
just under the terminal, using your own username (no need for sudo or root) use this command:
gsettings set com.canonical.Unity.Panel systray-whitelist "['all']"
Now, you might see the “all” part. This does mean that you can select only certain applications to go there, if you want them.
Sometimes, you need to change or remove a folder. but what to do when you get this pesky message saying that the folder “was being used by another process”?
well, if Windows complains, it is usually right. more then that, it is usually NOT the antivirus. If you suspect it is, here is how to disable most antivirus programs.
So, to get to the process that blocking you from moving the file, you need some help. my best solution for this is the Process Explorer. This is a great tool. now to fine the offending process, you just click find and insert the name of the folder. you will get the process ID and name of the process that blocks it. You can even kill (terminate) the problematic process.
Now, make sure you do not need any data contains in this process, because once you killed it… well, it’s dead, and the data can not be rescued.