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2232 articles
How to append string in Python
Python append string using different operators and functions such as str.join, + operator, += and format strings. Concatenate strings to one another.
Global Variables in Python: global, local, nonlocal, and modules
Learn Python global vs local variables, when to use the global and nonlocal keywords, reading and writing globals from functions, mutables, modules, common …
Your Friendly Guide to Type Checking in Python
Discover the transformative power of Type Checking in Python and enhance your coding precision. Explore essential strategies, avoid common mistakes, and unlock …
Print variable in Python like a PRO [7 Methods]
In this tutorial we will learn how to print variable in python using different methods. Use plus to concatenate strings and print them, use format strings to …
How to disable SELinux (with and without reboot)
What is SELinux and how can i disable SElinux permanently with or without reboot. Change SELinux mode runtime using setenforce. Enable permissive mode for …
Found a swap file by the name .XXX.swp
What is .swp file? Why this file is created? How to get rid of Found a swap file by the name warning? Another program may be editing the same file. An edit …
Beginners guide to use ssh config file with examples
beginners guide to learn and use ssh config file with example to define different SSH client arguments, There are different configuration files which can be …
Bash if else and elif: if then else, conditions, and `[[` vs `[`
Bash if else and bash if then else with elif chains, if else in bash shell scripts, combining conditions, nested if, exit-status semantics, and [[ ]] vs [ ] …
Bash function: define, call, arguments, `local`, and `return`
Bash define function with name() or function keyword, bash function example calls, bash script function arguments ($1, $@), local vs global variables, return …
chmod Recursive in Linux: Change File & Directory Permissions Safely
Learn how to use chmod recursive (-R) in Linux with clear examples. Change permissions for all files or directories using 755 or 777, avoid common mistakes, and …
10 examples to generate SSH key in Linux (ssh-keygen)
Use ssh-keygen to generate SSH key to use public key based authentication in Linux. Create key pair with custom filename, change passphrase of existing private …
Bash while loop: syntax, `while true`, `read`, `break`, and “do while” in Bash
Bash while loops: `while`/`do`/`done`, any command as the condition, `while true` with `break` and `continue`, `while read` over files, do-while style with …
Bash for loop: list form, C-style `(( ))`, arrays, break, and continue
Bash for loop and for loop in bash: iterate words, arrays with "${a[@]}", C-style for ((i=0;i
SOLVED: SSH fails with postponed publickey error
[Solved} Steps to debug and fix postponed publickey error leading to SSH connection failure. You may also get ROOT LOGIN REFUSED, Failed pubkey, permission …
Bash compare numbers and integers: variables, [[ ]], (( )), and pitfalls
Bash compare numbers and integers with -eq, -lt, -gt, bash compare variable to number in [[ ]] and (( )), bash if numeric comparison patterns, test, loops, and …