QA | Tutorial

How to install GNOME 3 in Ubuntu MATE 18.04?

ByEric Ma Jul 31, 2018Nov 21, 2019

How to install the GNOME 3 (gnome-shell) desktop environment in Ubuntu MATE 18.04?

To install gnome3 to Ubuntu, install these packages

sudo apt install gnome-session gdm3 ubuntu-desktop

During installation, the installation tools will let you choose the default display manager. You may choose gdm3.

Then reboot you Ubuntu Linux and gdm3 will be shown. Click the gear icon to select “GNOME” or “Ubuntu” as the desktop environment and you will boot to gnome-shell. You may continue installing more software as you need them.

QA

How to repair a MySQL table?
ByQ A Mar 24, 2018

After a server crash and restarting, MyBB reports a SQL Error as follows: MyBB SQL Error MyBB has experienced an internal SQL error and cannot continue. SQL Error: 145 – Table ‘./mybb/mybb_sessions’ is marked as crashed and should be repaired Query: SELECT * FROM mybb_sessions WHERE sid=’40021925bd0494ea31…’ AND ip=’x.x.x.x’ LIMIT 1 The dababase is MySQL….

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Mobile

Setting Up POP3/IMAP Email Box on Nokia E71
ByEric Ma Jul 13, 2013Aug 30, 2020

The software in Nokia E71 already support POP3 and IMAP email box. But we may lead to install Nokia messaging and setting up account of Nokia messaging. Storing our emails in remote servers isn’t a secure way. And why not use IMAP directly if it is supported by the system software? How to set up…

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QA

How to convert an object to json in Node.js?
ByEric Ma Mar 24, 2018Mar 24, 2018

How to convert general JavaScript objects to json in Node.js? Assume jo is a JavaScript object, you can convert it to a json string by: JSON.stringify(jo) Read more: How to get the metadata of an AWS S3 object? Reading JSON from URL in R WPS’ wpp program reports “libbz2.so.1.0: cannot open shared object file” on…

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QA

How to find broken soft links in a directory?
ByEric Ma Mar 24, 2018Mar 24, 2018

How to find broken symbolic links in a directory which have many symbolic links? Use this command to find broken soft links: find -xtype l /path/to/dir/to/find/in/ You can also specify the action by -exec. For example, delete the soft links that are broken in the current directory: find -xtype l -exec rm -f {} ;…

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Linux | Tutorial

Making GPT Partition Table and Creating Partitions Using parted in Linux
ByEric Ma Oct 5, 2014Nov 21, 2020

My best favorite disk partition table manipulation tools are cfdisk/fdisk on Linux. However, for large disks, cfdisk/fdisk (of the versions by this post is written) will just give up with a message suggesting GPT partition table format and using GNU parted like WARNING: The size of this disk is 6.0 TB (6001042391040 bytes). DOS partition…

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Programming

Send Messages to Other Windows Using Win32 API
ByEric Ma Jul 13, 2013

It is simple for basic use. Just the example code. It is clear enough. int SendMsgToOtherWindow( ) { // find window by name HWND wnd = FindWindow( 0, “计算器” ); if ( wnd == 0 ) return 0; // print the child window text HWND cwd = GetWindow( wnd, GW_CHILD ); while ( cwd )…

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