I have many files in a directory on Linux. How to find top K largest files in a directory? For example, find top 10 (K=10) large files in the current directory: du -h –max-depth 1 * | sort -rh | head -n 10
I have many files under a directory. How to find those files under the directory that are larger than certain size, say 500MB? Find the files that are larger than 500MB in the current directory (./): find ./ -size +500M Prints our more information about these files: find ./ -size +500M -exec ls -lh {}…
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 {} ;…
How to change the fonts of gnome-shell for gnome3? Like the system bar. The fonts of gnome-shell is described in its own theme. For the default gnome-shell, you need to edit the file as root: /usr/share/gnome-shell/theme/gnome-shell.css Right, it is a css file. Find the font-family keyword and change the corresponding fonts. Then you can restart…
How to change the fonts used in Gnome 3? The default configuration tool of gnome does not provide an option to change the fonts. However, the gnome-tweak-tool provides it. If you have not installed it, you need to install it first. On Fedora, run # yum install gnome-tweak-tool. Then you can run gnome-tweak-tool and set…
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How to change my password on a Linux box? The original password is generated by the administrator for me. User the passwd command. The easiest way: Log in the Linux box with your account Run passwd and it will ask your old and new passwords.
Managing our research cluster, I frequently need to generate some string for new users’ password. How to generate them automatically and randomly in Scala? The passwords need characters ‘a’ – ‘z’, ‘A’ – ‘Z’ and ‘0’ – ‘9’ only. This piece of code works very well for me: def randomString(len: Int): String = { val…
Sometimes, we need to write paper reviews after read many papers which belong to a specific area (like information retrieval). I have found some useful links which are as follows. http://www.uwlax.edu/biology/communication/ReviewPapers.htmlhttps://users.ece.utexas.edu/~miryung/teaching/EE382V-Fall2009/review.html
What’s the syntactical difference among OCaml, Scala, F# and Haskell. This page gives a side-by-side reference among OCaml, F#, Scala and Haskell: ML Dialects and Friends: OCaml, F#, Scala, Haskell
What other mobile messengers like WhatsApp in the market? Messneger Apps focusing on mobile phones WhatsApp: http://www.whatsapp.com/ WeChat: http://www.wechat.com/en/ Kik: http://kik.com/ Kakao Talk: http://www.kakao.com/talk/en LINE: http://line.me/en/ Other “general” messengers that also have mobile clients Google Hangouts: http://www.google.com/ /learnmore/hangouts/ Facebook Messenger: https://www.facebook.com/mobile/messenger Skype: http://www.skype.com/en/download-skype/skype-for-mobile/
Kindle is good for reading. However, the A4-size technical/academic paper is pain to read on Kindle 5—the fonts are too small. The “email to Kindl” converting tool provided by Amazon usually loses the formats in the technical paper. How to convert A4 paper format to read on Kindle 5? I use k2pdfopt tool (hey, source…
How to allow contributors to Upload Files in wordpress? I allow my wordpress site’s contributors to submit posts. But by default, WordPress contributors do not have the capability to upload files. How to allow them to upload files? The key to my solution to add the upload files capability to contributors in WordPress is the…
Should I buy a Kindle paperwhite or regular Kindle? Actually, you can click the following link to get the answers :-)http://www.reddit.com/r/kindle/comments/16in81/should_i_get_a_paperwhite_or_regular_kindle/
This problem appears when I try to rsync directories with hosts inside a cluster used NAT for forwarding ports to internal nodes. Hence, the ssh port for internal nodes are not the default 22. So, how to use rsync with the non-standard ssh ports? The -e options of rsync play the trick very well. For…
How to convert a MS Word document file such as .docx and .doc to pdf on Linux using command line tools? Use LibreOffice: libreoffice –headless –convert-to pdf –outdir /path/to/out/dir/ /path/to/doc/docx/file While this LibreOffice answer works, the –headless option still needs as display, even though it does not use it. In otherwords, this option won’t work…
How to make gnuplot generate eps files instead of plot the figures on screen? First, save a Gnuplot plot as a PostScript file by this commands: # gnuplot> load ‘saveplot’ # gnuplot> !mv my-plot.ps another-file.ps The saveplot file’s content: set size 1.0, 0.6 set terminal postscript portrait enhanced mono dashed lw 1 “Helvetica” 14 set…
I messed up with one file in one repository and want to check out only that file back to a commit. How to achieve this? To check the file with my_file.name at git commit commit_sha1: $ git checkout commit_sha1 my_file.name You can also use the relative commit instead of commit_sha1 such as master~4, HEAD~4, HEAD^,…
How to install Python environment in my own account on Dreamhost so that my application can use the python that I installed by myself instead of the system-wide one? The post for Bluehost works very well for Dreamhost too: https://my.bluehost.com/cgi/help/python-install In short: mkdir ~/python cd ~/python wget http://www.python.org/ftp/python/2.7.2/Python-2.7.2.tgz tar zxfv Python-2.7.2.tgz find ~/python -type d…
It was ever possible to set it in gnome-teak-tool. However, in the latest Gnome 3, it disappears. Is there any other way to set it? The configuration is the org.gnome.desktop.wm.preferences titlebar-font under dconf. You can use dconf-editor to find the appropriate key entry and set it. Or use gsettings: $ gsettings set org.gnome.desktop.wm.preferences titlebar-font ‘Sans…