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tsort(1) -- topological sort of a directed graph
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tsort takes a list of pairs of node names representing directed arcs in a graph and prints the nodes in topological order on standard output. That is, the input describes a partial ordering relation, ... |
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tty(1) -- return user's terminal name
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The tty utility writes the name of the terminal attached to standard input to standard output. The name that is written is the string returned by ttyname(3). If the standard input is not a terminal, t... |
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ul(1) -- do underlining
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ul reads the named files (or standard input if none are given) and translates occurrences of underscores to the sequence which indicates underlining for the terminal in use, as specified by the enviro... |
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ulimit(1) -- public domain Korn shell
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ksh is a command interpreter intended for both interactive and shell script use. Its command language is a superset of the sh(1) shell language. Shell startup [Toc] [Back] The following options ... |
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uname(1) -- print operating system name
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The uname utility writes symbols representing one or more system characteristics to the standard output. The options are as follows: -a Behave as though all of the options -mnrsv were specified. -m Pr... |
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uncompress(1) -- compress and expand data
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The compress and gzip utilities reduce the size of the named files using adaptive Lempel-Ziv coding. They are functionally identical, but use different algorithms for compression. If invoked as gzip o... |
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unexpand(1) -- expand tabs to spaces, and vice versa
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expand processes the named files or the standard input, writing the standard output with tabs changed into blanks. Backspace characters are preserved into the output and decrement the column count for... |
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unifdef(1) -- remove preprocessor conditionals from code
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The unifdef utility selectively processes conditional cpp(1) directives. It removes from a file both the directives and any additional text that they specify should be removed, while otherwise leaving... |
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uniq(1) -- report or filter out repeated lines in a file
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The uniq utility reads the standard input comparing adjacent lines and writes a copy of each unique input line to the standard output. The second and succeeding copies of identical adjacent input line... |
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units(1) -- conversion program
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The units program converts quantities expressed in various scales to their equivalents in other scales. The units program can only handle multiplicative scale changes. It cannot convert Celsius to Fah... |
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unlimit(1) -- a shell (command interpreter) with C-like syntax
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csh is a command language interpreter incorporating a history mechanism (see History substitutions), job control facilities (see Jobs), interactive file name and user name completion (see File name co... |
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unprotoize(1) -- automatically add or remove function prototypes
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protoize is an optional part of GNU C. You can use it to add prototypes to a program, thus converting the program to ANSI C in one respect. The companion program unprotoize does the reverse: it remove... |
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unvis(1) -- revert a visual representation of data back to original form
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unvis is the inverse function of vis(1). It reverts a visual representation of data back to its original form on standard output. |
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uptime(1) -- show how long system has been running
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The uptime utility displays the current time, the length of time the system has been up, the number of users, and the load average of the system over the last 1, 5, and 15 minutes. This is the ``headi... |
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usbhidaction(1) -- perform actions according to USB HID controls
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usbhidaction can be used to execute commands when certain values appear on HID controls. The normal operation for this program is to read the configuration file and then become a daemon and execute co... |
