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tail has two special command line option -f and -F (follow) that allows a file to be monitored. Instead of just displaying the last few lines and exiting, tail displays the lines and then monitors the file. As new lines are added to the file by another process, tail updates the display. This is particularly useful for monitoring log files.
Supersedes other *sum utilities with -a option from version 9.0. comm: Compares two sorted files line by line csplit: Splits a file into sections determined by context lines cut: Removes sections from each line of files expand: Converts tabs to spaces fmt: Simple optimal text formatter fold: Wraps each input line to fit in specified width head
The Shellshock bug affects Bash, a program that various Unix-based systems use to execute command lines and command scripts. It is often installed as the system's default command-line interface. Analysis of the source code history of Bash shows the bug was introduced on 5 August 1989, and released in Bash version 1.03 on 1 September 1989. [14 ...
Version 5 AT&T UNIX test: Shell programming Mandatory Evaluate expression: Version 7 AT&T UNIX time: Process management Mandatory Retrieve and format time and date Version 3 AT&T UNIX timeout: Process management Mandatory Run command with a time limit Version 3 AT&T UNIX touch: Filesystem Mandatory Change file access and modification times
The GNU Core Utilities or coreutils is a package of GNU software containing implementations for many of the basic tools, such as cat, ls, and rm, which are used on Unix-like operating systems. In September 2002, the GNU coreutils were created by merging the earlier packages textutils , shellutils , and fileutils , along with some other ...
While xz is commonly present in most Linux distributions, at the time of discovery the backdoored version had not yet been widely deployed to production systems, but was present in development versions of major distributions. [6] The backdoor was discovered by the software developer Andres Freund, who announced his findings on 29 March 2024. [7]
In early versions of Unix the history command was a separate program. However, most shells have long included the history command as a shell built-in , so the separate program is no longer in common use.
The collection was last updated externally on April 15, 2003, by Karl M. Syring. The most recent release package available as of December 2016 [update] was an open-source project, UnxUtils at SourceForge , with the latest binary release in March, 2007 (though the files within are dated from the year 2000).