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Guide to the wget Command: Downloading Files from the Web
`wget` (short for Web Get) is a non-interactive command-line utility used to download files from web servers using HTTP, HTTPS, and FTP protocols. It can operate in the background and has the ability to automatically resume downloads in case of network issues, making it particularly useful for large files or unstable network environments. Use this guide to learn the basic usage of `wget` and its various download options.
Guide to the whereis Command: Finding the Location of Commands/Files
`whereis` command is used in Linux and Unix-like operating systems to locate the binary, source code, and manual page files of a command. It is useful when you need to quickly determine the path of a specific program or file installed on the system, especially when checking the existence of a program in shell scripts or dynamically referencing paths. Through this guide, learn how to use the `whereis` command and its main options.
Guide to the 'which' Command: Finding the Location of Executable Commands
The `which` command is used in Linux and Unix-like operating systems to locate the executable file associated with a given command in the directories listed in the `PATH` environment variable, essentially determining which command will be executed. It is very useful for checking the existence of programs in shell scripts or for figuring out which version of a program with the same name will be executed. Through this guide, you will learn how to use the `which` command and its main options.
Guide to the 'who' Command: Check Current Logged-in Users
`who` command is used to display information about users currently logged into the system on Linux and Unix-like operating systems. It allows you to quickly check which users are logged in, through which terminals, and since when, making it a fundamental tool for system administration and monitoring. Learn how to use the `who` command and its main options through this guide.
whoami: Display the Current Logged-in Username
The `whoami` command prints the effective username of the current logged-in user. It is useful for quickly verifying which user is executing commands.
write: Send a message to another user
The write command is a utility that allows you to send a direct message to another user currently logged into the system. The text you input is displayed in real-time on the recipient's terminal, making it useful for simple one-on-one communication.
xargs: Build and execute command lines from standard input
The xargs command reads items from standard input (stdin), delimited by blanks or newlines, and executes the command specified by the user with any initial arguments followed by items read from standard input. It is very useful for automating complex tasks such as converting multiple lines of input passed through a pipe (|) into arguments for a single command, or limiting the number of arguments that can be processed at once.
xxd: Hex Dump and Reverse Conversion Tool
The `xxd` command is a tool used to dump (output) files in hexadecimal format or, conversely, to reverse convert a hexadecimal dump back into the original binary file. It is more flexible than `hexdump` and particularly useful when editing the content of a binary file and then converting it back to its original form.
yes: Repeat strings indefinitely
The `yes` command repeatedly outputs a specified string (defaulting to 'y') on a new line. It is primarily used in scripts to automatically provide a 'y' or other response to user confirmation prompts. It continues to run until interrupted by pressing Ctrl+C.
zip Command Guide: Compressing Files and Directories
`zip` command is used to compress files and directories in `.zip` format on Linux and Unix-like operating systems. The `.zip` format is widely supported across various operating systems, including Windows, making it very convenient for file exchange and distribution. Through this guide, learn how to install the `zip` command, basic usage, and various compression options.
zsh: The Z Shell
zsh is a powerful and highly customizable Unix shell. It incorporates many features from Bash, ksh, and tcsh, and offers significant improvements such as advanced autocompletion, themes, and a plugin system, making it popular among developers and power users.