SEARCH KEYWORD -- Files
Use rsync to delete mass files quickly in Linux
Yesterday I encountered an issue to delete many log files in my Linux workstation, there were around 100,000 files to be deleted. These are log files and they grow very fast, and we need to delete them frequently. Usually we would use rm -rf * to delete these files, but we may need to wait for a relative long time if there are too many files. So we must adopt some unusual way. Fortunately, we can use rsync to delete mass files in one shot. 1. Install rsync yum install rsync 2. Create a new empty...
rsync,delete file, demo 2012-11-13 10:44:50
My frequently used Linux commands
In our day to day work. We may have many chances working on Linux/Unix systems. There are many things we may need to do, checking logs, navigating in directories, creating file or installing software. We may use many commands to complete the work, such as ls, mkdir, cd etc. Below are my frequently used Linux commands or programs recently: pwd : print working directory, sometimes I need to check which working directory I am in in order to know where to go next. ls : List current directory files,...
Read 10 new books from O'Reilly for free
Recently O'Reilly provided free access to some books. Some of them are even in early release status. Here we recommend 10 of them. 1ã€Mastering Perl 2ã€Git Pocket Guide 3ã€Vagrant: Up and Running 4ã€High Performance Browser Networking 5ã€802.11ac: A Survival Guide 6ã€Test-Driven Development with Python 7ã€Interactive Data Visualization for the Web 8ã€HTML5 Canvas 9ã€Programming JavaScript Applications 10ã€Agile Data Source : http://linu...
O'Reilly,Free book,Early release 2013-07-03 07:56:20
Find files by size in Linux
In Linux systems, you may encounter a situation where there is no enough space on the system while you are trying to install some new packages or writing some data. In this case, you may want to clear some unneeded files. A frequent need will be find the largest files in the system so that they can be deleted first and disk space can be released quickly. In this post, we will show a simple command to find files by size so that we know what files are taking the specified space on the system, This...
What is an HTC File?
Question: What is an HTC File?Did you find an HTC file on your computer and wonder what program should open it? Maybe someone emailed you an HTC file but you're not sure how to use it. Perhaps you tried to open the HTC file but Windows told you that it could not open it. Before you can open an HTC file (assuming it's even a file format that's intended to be viewed or edited), you'll need to determine what kind of file the HTC file extension refers to. Answer: A file with the HTC file exte...
HTC,HTML Component,JavaScript,Extension 2011-06-30 23:07:44
Hide a file in a picture
Sometimes if you want to hide some important files on your computer which you don't want others to see, how would you do that? Find a professional tool? Set password for some folders? Change the file properties to hidden? They are possible, but they may not be so convenient or so secure. Here we share with you how to hide a file in a picture. Prerequisites 1 picture for example : test.jpg 1 test file, for example : test.txt WinRAR Steps Prepare the picture test.jpg and test file test.txt Use ...
Trick,Picture,Fil hiding,WinRAR 2012-09-13 19:36:36
What are some lesser known but useful Unix commands?
A few that come to mind, some less known, some more: xargs or parallel: run things in parallel, with lots of options sed and awk: more well-known but still super useful for processing text files, and faster than Python or Ruby m4: simple macro processor screen: powerful terminal multiplexing and session persistence yes: print a string a lot cal: nice calendar env: run a command (useful in scripts) look: find English words (or lines in a file) beginning with a string cut and paste and join: data...
A possible way to recover deleted files on Linux
Last week I was generating a MD5 sum for an virtual machine image on one OpenNebula server: # ls -l test.img -rw-r--r-- 1 root root 10486808576 Oct 12 02:21 test.img # md5sum test.img At the same time I was clearing the files on the server on another terminal and deleted the above image file mistakenly with : # rm test.img Since this image file is 10GB, it took some time to remove this file from the server, so I used the Ctrl+Z command to suspend the remove command. [1]+ Stopped ...
Unix directory hierarchy history
As a beginner user of Unix or Linux, people would frequently get confused about the use of different directories of the system. For example, there is a /bin directory under root(/), it is used to store binary files. However, there are /usr/bin and /usr/local/bin under /usr which are used for storing binary files as well. Some systems even have /opt/bin. What are the differences among them? Though there are articles explaining different directories in *nix such as Filesystem Hierarchy Stan...
UNIX,LINUX,FILESSYTEM,DIRECTORY HIERARCHY,HISTORY 2016-10-21 23:47:17
Beginners guide to Linux directory structure
Have you ever looked in your / directory, you’ll see a lot of directories. Here we are presenting beginners guide to linux directory structure explaining what they mean and what are the contents of these directories.Screenshot of contents of root directory: /This is called root partition. All files and directories start with root partition. Write privileges under this directory are avaible with root user only. Not to confuse it with root user’s home directory, know the ...
Linux,File system structure,Beginner's guide 2012-04-20 12:19:32
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