How to reset the keyboard set by xmodmap on Linux?

ByEric Ma Mar 24, 2018Feb 9, 2019

You can reset your keyboard settings by:

setxkbmap

setxkbmap -option

depending on the way the keyboard was set by xmodmap.

QA

How to resize a batch of images on Linux?
ByEric Ma Mar 24, 2018Mar 24, 2018

Resizing images on Linux with gThumb is easy. However, I have a batch of images inside a folder. Manually resizing them will consume too much time. How to automatically resize them on Linux with a script? You can use convert from ImageMagick together with bash script to resize images inside a directory. mkdir resize; IFS=$(echo…

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QA

How to view a file at a specific commit in git?
ByEric Ma Mar 24, 2018Mar 24, 2018

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 Read more: How to produce a patch file for a specific…

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Programming

How to Add Custom Content on a Receipt
Byjameswarner Dec 11, 2017Apr 9, 2018

This blog will explain about how to add a custom content in a Receipt which will be generated from MPOS in Microsoft Dynamics. Microsoft provides us with certain fields which can be put into the receipt. There are certain fields which a client will ask to show in the receipt. If the desired field is…

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QA

How to set and get an environment variable in C on Linux?
ByQ A Mar 24, 2018

How to set and get an environment variable in C on Linux? You can use the setenv and getenv POSIX APIs to set and get environment variables. To add or change environment variable: #include <stdlib.h> int setenv(const char *envname, const char *envval, int overwrite); To get value of an environment variable: #include <stdlib.h> char *getenv(const…

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Programming

Hashing Library for C
ByEric Ma Jul 13, 2013Mar 27, 2018

I try to find some Hashing libraries for C and find several good ones. The hsearch function in the GNU C library. There are other methods to organize information which later should be searched. The costs of insert, delete and search differ. One possible implementation is using hashing tables. The following functions are declared in…

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QA

How to make dd faster on Linux?
ByQ A Mar 24, 2018

dd seems slow when I use command like # dd if=/dev/sda2 of=./sda2.bak How to make it faster? You can make dd faster by specifying a good bs like # dd if=/dev/sda2 of=./sda2.bak bs=8192 8192 is a magic number. There are may be other good sizes for bs for different systems. But 8192 works pretty well…

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One Comment

Mooffie says:

Jan 28, 2019 at 4:03 pm

Doens’t work. You need to do `setxkbmap -option` instead.

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