ego

Synchronize the Portage tree

$ ego sync

$ ego boot update

$ ego doc [wiki_page]

$ ego profile show

$ ego profile mix-in +[gnome] -[kde-plasma-5]

$ ego query bug [package]

echo [OPTION]... [STRING]...

-n
    Do not output the trailing newline character.

-e
    Enable interpretation of backslash escapes (e.g., \n for newline, \t for tab, \\ for a literal backslash).

-E
    Disable interpretation of backslash escapes (this is the default for GNU echo, overrides -e if both are present).

STRING...
    One or more strings of text or variables to be displayed. If multiple strings are provided, they are separated by spaces in the output.

The echo command is a fundamental utility in Unix-like operating systems, primarily used to display a line of text or variable content on the standard output. It's an indispensable tool in shell scripting, where it's widely employed for various purposes such as printing messages to the user, debugging scripts by showing variable values, creating simple files, or sending data to other commands through pipes.

The command can interpret backslash-escaped characters (like \n for newline, \t for tab) if the -e option is used, allowing for formatted output. Conversely, the -n option prevents echo from appending a trailing newline character to its output, which is useful when building prompts or concatenating output. Its simplicity and effectiveness make it one of the most frequently used commands for basic output operations.

The command 'ego' is not a standard Linux command found in typical distributions. This analysis provides information for the widely used echo command, which is a standard utility that may have been the intended command due to phonetic similarity or a typo. Users should be aware that echo behavior can differ between shell built-ins and stand-alone utilities.

The echo command is commonly provided as a built-in command by various shells (like bash, zsh, ksh) for faster execution, as well as a standalone executable (e.g., /bin/echo). The behavior of the shell's built-in version might sometimes differ subtly from the standalone utility, particularly regarding the default interpretation of escape sequences or the handling of specific options. For scripting that requires maximum portability and predictable output across different environments, printf is generally recommended over echo due to its more consistent behavior.

The echo command has been an integral part of Unix-like operating systems since their early versions. Its behavior, particularly regarding the interpretation of backslash escapes and the presence or default of the -E option, has seen some variations across different shell implementations (e.g., bash, zsh, ksh) and the standalone /bin/echo utility. This historical inconsistency, especially when aiming for robust and portable scripting, often led to the development and preference for the printf command for more controlled and consistent output formatting.

printf(1), sh(1), bash(1)