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Shuja Rafi
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https://github.com/shujarafi

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Connect Huawei Modem Linux - USB Modeswitch

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When you connect a USB modem to a Linux system, it often identifies the modem as a USB storage device. As a result, you may not be able to access the internet through the modem. To resolve this issue, you need to change the device's identification mode using the usb-modeswitch package. If your system already has internet access, you can easily install this package. First, you should check whether usb-modeswitch is already installed on your system. To do this, open the Terminal and type the following command: sudo usb_modeswitch If the package is installed, you will see output confirming its presence on your system.
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Compiler, Obect Code / Relocatable Code, Linker

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When we compile a C source file using the GNU C compiler (GCC), the compiler first translates the code into an assembly source file. This assembly source is then processed by the assembler, which is included with GCC. The assembler generates object code, which is in a relocatable machine code format and is usually not directly executable. Next, the linker steps in to link the necessary libraries. Libraries are also in a relocatable format, which is why we compile them with the -shared, -fpic, or -fPIC flags. During the linking process, the linker checks the library names included in the source file and verifies whether these libraries are available in the system’s default library path, typically /usr/lib on GNU/Linux systems. If the required libraries are not in the default path, you can specify their location by passing them as an argument to GCC using the -I flag, like so: gcc -I/home/shuja/Documents/libmy.so C Source File  Assembly Source (generated  by GNU C compiler...
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Java Byte Code, Interpreter and JIT

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Generally, when a program is compiled to an intermediate level and then interpreted  by a virtual machine, it runs slower than it would run if compiled to machine code. However, with Java, the differential between the two is not important for general purpose. Because byte-codes are highly  optimized, the use of byte-code enables the Java Virtual Machine to execute programs much  faster than you might expect. Java is also designed as an interpreted language, so java does not have anything to stop  (on the fly) compilation of byte-code into machine code, to improve  performance. For this reason, the HotSpot technology was introduced after Java’s initial release. HotSpot provides a Just In Time (JIT) compiler for bytecode. When a JIT compiler is part  of the JVM, selected set of bytecode are compiled into executable code in real time,  on a piece, by, piece, demand basis.  It is important to understand that it is not practical to  compile ...
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