How to change default Python version ?

There are various ways to change the default Python version on Linux. This article discuss some of the ways to change the default version of Python. This article is equally applicable for other executable also. Modify .bashrc Open your .bashrc file in a text editor.vim ~/.bashrc. Type alias python=python3 on [...]

2021-10-27T00:01:06+05:30Categories: Linux|Tags: |

Keyboard Shortcuts in Bash Shell

Terminal is a program called a terminal emulator. It opens a window and lets you interact with the shell. This post covers various keyboard shortcuts which are supported in bash and zsh shell. Key commands for both shells are similar and knowing these time-saving shortcuts can be a great boon [...]

2021-07-06T19:00:02+05:30Categories: Linux|Tags: |

apt Command in Linux

apt is a command-line utility for installing, updating and removing packages on Debian, and related Linux distributions. It performs a similar function to apt-get, but with some additional functions, conveniences, and features. Most of the apt commands must be run as a user with sudo privileges. Syntax Below is the [...]

2021-05-23T22:21:37+05:30Categories: Linux|

Division Functions in Linux kernel

On 64 bit Linux kernel, division (/) and modulus operator (%) will behaved as expected. GCC C compiler generates code that calls functions in the libgcc library to implement the / and % operations with 64-bit operands on 32-bit CPUs. Linux kernel is not linked against the libgcc library, so [...]

2021-04-07T11:37:16+05:30Categories: Linux|

How to find script file name in a Bash script?

Sometime we want to know the file name of the script which we are executing in bash scripting. One such scenarios is use the file name for logging purpose, without hardcoding the name of the script file. In the below example, readlink prints out the value of a symbolic link. [...]

2021-04-06T12:45:57+05:30Categories: Linux|Tags: |

Linux Kernel Debugging

Various debugging technique are available for Linux Kernel Debugging. Most common of them is adding log and printing them using printk. This post list various technique which are useful for debugging a issue. Adding Additional Log printk is similar with printf on C standard library. It can be called from [...]

2021-03-21T00:45:38+05:30Categories: Linux|

Configuration Options for Debugging Linux Kernel

Linux supports various configuration options for debugging Linux Kernel. Some of these options are not supported on all the platforms. Some of the available configuration options are CONFIG_DEBUG_KERNEL : It makes other debugging options available, but does not enable any features.CONFIG_DEBUG_SLAB : This option turns on several types of checks [...]

2021-03-20T23:38:39+05:30Categories: Linux|Tags: |

Export Command in Linux

Introduction export command in Linux marks an environment variable to be exported with any newly forked child processes and thus it allows a child process to inherit all marked variables. Frequently Used Options -p : List of all names that are exported in the current shell-n : Remove names from [...]

2021-03-19T23:57:20+05:30Categories: Linux|

Source Command in Linux

The source command read and execute commands from the filename argument in the current shell context. When a script is run using source it runs within the existing shell, any variables created or modified by the script will remain available after the script completes. In contrast if the script is [...]

2021-03-14T00:36:00+05:30Categories: Linux|

Time Command in Linux

The time command in Linux runs the specified program command with the given arguments. When command finishes, time writes a message to standard error giving timing statistics about this program run. It shows Elapsed real time between invocation and terminationUser CPU time, i.e. amount of CPU time spent in user [...]

2021-03-12T01:45:54+05:30Categories: Linux|
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