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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.
sort lines of text files split: Splits a file into pieces sum: Checksums and counts the blocks in a file tac: Concatenates and prints files in reverse order line by line tail: Outputs the last part of files tr: Translates or deletes characters tsort: Performs a topological sort: unexpand: Converts spaces to tabs uniq: Removes duplicate lines ...
Version 1 AT&T UNIX dd: Filesystem Mandatory Convert and copy a file Version 5 AT&T UNIX delta: SCCS Optional (XSI) Make a delta (change) to an SCCS file PWB UNIX df: Filesystem Mandatory Report free disk space Version 1 AT&T UNIX diff: Text processing Mandatory Compare two files; see also cmp Version 5 AT&T UNIX dirname: Filesystem Mandatory
Tails was first released on June 23, 2009. It is the next iteration of development on Incognito, a discontinued Gentoo-based Linux distribution. [9] The original project was called Amnesia. The operating system was born when Amnesia was merged with Incognito. [10]
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).
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.
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