unlink
Remove a link to a file from the filesystem.The file contents is lost if the link is the last one to the file.
units
Convert between two units of measure.
unison
Bidirectional file synchronisation tool.
uniq
Output the unique lines from a input or file.Since it does not detect repeated lines unless they are adjacent, we need to sort them first.
unimatrix
Simulate the Matrix look with Unicode characters.See also: cmatrix.
cmatrix
unflatten
Adjust directed graphs to improve the layout aspect ratio.Graphviz filters: acyclic, bcomps, comps, edgepaint, gvcolor, gvpack, mingle, nop, sccmap, tred, & unflatten.
acyclic
bcomps
comps
edgepaint
gvcolor
gvpack
mingle
nop
sccmap
tred
unexpand
Convert spaces to tabs.
uncrustify
C, C++, C#, D, Java and Pawn source code formatter.
unclutter
Hides the mouse cursor.
unar
Extract contents from archive files.
uname
Print details about the current machine and the operating system running on it.Note: for additional information about the operating system, try the sw_vers command.
sw_vers
unalias
Remove aliases.
umount
Unlink a filesystem from its mount point, making it no longer accessible.A filesystem cannot be unmounted when it is busy.
umask
Manage the read/write/execute permissions that are masked out (i.e. restricted) for newly created files by the user.
ulimit
Get and set resource limits for user processes.
ugrep
Ultra fast search tool with query TUI.
ufraw-batch
Convert RAW files from cameras into standard image files.
u3d
A set of tools to interact with Unity.
typst
Compile a Typst file to PDF.Note: Specifying the output location is optional.
typeset
This command is an alias of declare.
declare