Do you know how to display chinese character in lxterminal? I tried to install lxterminal on my workstation and it seems display Chinese characters well: FYI, my Linux system is Fedora 21. The lxterminal version: $ rpm -q lxterminal lxterminal-0.1.11-10.fc21.x86_64 Not sure what’s the reason why it does not work for you. You may check…
Differences beween DDL (Data Definition Language) and DML (Data Manipulation Language) Data Definition Language (DDL) statements are used to define the database structure or schema. Data Manipulation Language (DML) statements are used for managing data within schema objects. References:http://www.orafaq.com/faq/what_are_the_difference_between_ddl_dml_and_dcl_commands
Now, I have a running HDFS cluster storing lost files. I want to change its default replication factor. How to change it? What will happen after it is changed? For example, I change from 2 to 3. Will HDFS automatically re-replicate the data chunks? First, the replication factor is client decided. Second, the replication factor…
How to install gitbook on my own Linux box? First, install node.js following https://www.systutorials.com/qa/1268/how-to-install-node-js-on-fedora or How to install node.js on Ubuntu/Linux Mint depending on your distro. Second, install gitbook by npm to /opt/: # cd /opt/ # npm install gitbook Then, the gitbook can be invoked by /opt/node_modules/gitbook/bin/gitbook.js You may need to install the latest…
Some important concepts in distributed system like Hadoop distributed file system, Google file system and so on. Answer from http://www.quora.com/Whats-the-difference-between-Reliability-Durability-and-Availability-for-data-storage-system The difference between durability and availability is fairly simple. Durability is about what happens when all power goes out everywhere. Has all data been written to stable storage that doesn’t require power (e.g. disk/flash), in…
offlineimap actually does “synchronization”—if an email is deleted from the server, the email will be deleted from the local Maildir (http://offlineimap.org). This is good for mail sync. However, for backing up emails,one would like to keep the email even if it is deleted from the server. How to achieve this? You may use `getmail` which…
The question is as follows. harry@debian:~/workshop1/qemu_test/version1/test$ qemu-system-x86_64 -hda qcow2.img -cdrom domU-x86_64-FS.img -boot d -m 1024 VNC server running on `::1:5900′ harry@debian:~/workshop1/qemu_test/version1/test$ vncviewer 127.0.0.1:1 vncviewer: ConnectToTcpAddr: connect: Connection refused Unable to connect to VNC server Solution (add -vnc parameter for qemu-system-x86_64): harry@debian:~/workshop1/qemu_test/version1/test$ qemu-system-x86_64 -hda qcow2.img -cdrom domU-x86_64-FS.img -boot d -m 1024 -vnc 127.0.0.1:2 harry@debian:~/workshop1/qemu_test/version1/test$ vncviewer 127.0.0.1:2…
How to install ffmpeg on Linux Mint 17 Qiana? To install FFmpeg on Ubuntu 14.04 Trusty Tahr, Linux Mint 17 Qiana and etc: $ sudo add-apt-repository ppa:jon-severinsson/ffmpeg $ sudo apt-get update $ sudo apt-get install ffmpeg Does anyone know why this was taken out of the main repositories? Linux Mint 17 is based on Ubuntu…
How to convert a video file in format as flv to mp4 with ffmpeg? You may use method from here: https://www.systutorials.com/3540/converting-video-files-for-ipod-iphone-ipad/ ffmpeg -i input.flv output.mp4 Or by specifying more details about how to handling the codecs: ffmpeg -i input.flv -vcodec copy -acodec copy output.mp4 You may also add more options as you like. For more,…
How to install no-ip.com update client noip2 on Linux Mint 17? First, install the noip2 client: sudo su – cd /usr/local/src wget http://www.no-ip.com/client/linux/noip-duc-linux.tar.gz tar xzf noip-duc-linux.tar.gz cd no-ip-2.1.9-1 make make install Then, generate the configuration file noip2 -C Last, make noip2 daemon run at reboot crontab -e Add this line to crontab: @reboot /usr/local/bin/noip2 I’ve…
How to view a file at a specific commit/revision in git? You can use git show to view a file’s content at a specific commit in git: https://www.systutorials.com/docs/linux/man/1-git-show/ $ git show REVISION:/path/to/file You can also save a copy by $ git show REVISION:/path/to/file >file.copy
The disk management tools of Windows can adjust it to some level. But there are more space available as far as I can tell. How to further adjust the system partition (C:) size of Windows? You may check these tools: EASEUS Partition Master (free) Includes Partition Manager, Disk & Partition Copy Wizard and Partition Recovery…
What are the x86-64 instructions for floating-point comparisons like the cmpq for quard-word integer comparison? The SSE3 extenstions provide two instructions for comparing floating values: Instruction Based on Description ucomiss S2, S1 S1 – S2 Compare single precision ucomisd S2, S1 S1 – S2 Compare double precision As with cmpq, they follow the GAS convention…
How to download a youtube video to my computer? You may use the ClipConverter.cc for downloading Youtube videos: http://www.clipconverter.cc/ How to download a YouTube video: Paste your YouTube URL at ‘Media URL’ and press Continue. Select the format and the options for the conversion. The default options are for most videos a good setting. Press…
SSH tunnel and port forwarding is great and convenient to use. But is it possible to set up a VPN like connection over SSH? If you are on Linux or Mac, you can use sshuttle: https://github.com/apenwarr/sshuttle If you are on Windows, you can use ProxyCap: http://www.proxycap.com/index.html Both are great software.
Can I get the fclose Q2A theme used here? I’d like to share it but I also want to keep my site a little bit unique. What about this: you can get the css and qa-theme.php files, but need to find or design your own icons for the site (I believe some icons from other…
Trying to get your q2a theme. Is there a way you could send it on to me please? Would be incredibly appreciated The theme of the site ( https://www.systutorials.com ) is http://wordpress.org/themes/twentyfourteen with minor modifications. Some other features you find on the site are through plugins and HTMLs. If you are asking for the Q2A…
Tutorials on how to create patches and apply patches with git. A nice tutorial: https://ariejan.net/2009/10/26/how-to-create-and-apply-a-patch-with-git/ Manuals: git format-patch: https://www.systutorials.com/docs/linux/man/1-git-format-patch/git apply: https://www.systutorials.com/docs/linux/man/1-git-apply/
Chrome caches redirects. How to flush a cached redirect by Chrome? Clearing the cache/cookies for the specific domain (sorry, it is the domain level in this solution) as in https://www.systutorials.com/qa/453/how-to-remove-cookies-for-a-certain-site-in-chrome will also flush the redirect caches for this domain.
On Linux, how to download a webpage as a mobile browser? You can change the agent of curl to be a mobile browser’s and the remote webserver may be consider the request from a mobile browser: curl -A “Mozilla/5.0 (iPhone; CPU iPhone OS 6_1_3 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) CriOS/28.0.1500.12 Mobile/10B329 Safari/8536.25″…