General user edit

• dd^[1] – convert and copy a file
• date^[2] – date and time
• echo^[3] – print arguments
• file^[4] – determine file type
• ns^[5] – display namespace
• plumb^[6] – send message to plumber
• plumber^[7] – interprocess messaging
• rc^[8] – rc is the Plan 9 shell
• rio^[9] – the new Plan 9 windowing system
• 8½ – the old Plan 9 windowing system [1]
• uptime^[10] – show how long the system has been running

System management edit

Processes and tasks management edit

• time^[11] – time a command
• kill,^[12] slay,^[12] broke^[12] – print commands to kill processes
• sleep^[13] – suspend execution for an interval
• ps^[14] – process status
• psu^[14] – process status information about processes started by a specific user

User management and support edit

• passwd,^[15] netkey,^[15] iam – change user password
• who^[16] – who is using the machine
• man,^[17] lookman^[17] – print or find pages of this manual

File system and server edit

• /boot/boot^[18] – connect to the root file server
• fossil/fossil, fossil/flchk, fossil/flfmt, fossil/conf, fossil/last – archival file server
• history^[19] – print file names from the dump
• users^[20] – file server user list format
• vac^[21] – create a vac archive on Venti
• venti/buildindex, venti/checkarenas, venti/checkindex, venti/conf, venti/copy,^[22] venti/fmtarenas, venti/fmtindex, venti/fmtisect, venti/rdarena, venti/rdarenablocks, venti/read,^[22] venti/wrarenablocks, venti/write^[22] – Venti maintenance and debugging commands
• venti/venti,^[23] venti/sync – an archival block storage server
• yesterday,^[24] diffy^[24] – print file names from the dump

Hardware devices edit

• setrtc – set real time clock (RTC) on PC hardware

Files and text edit

Filesystem utilities edit

• chgrp^[25] – change file group
• chmod^[26] – change mode
• cp,^[27] fcp,^[27] mv^[27] – copy, move files
• du^[28] – disk usage
• ls,^[29] lc^[29] – list contents of directory
• mkdir^[30] – make a directory
• bind,^[31] mount,^[31] umount^[31] – change name space
• pwd,^[32] pbd^[32] – working directory
• rm^[33] – remove files
• touch^[34] – set modification date of a file

Archivers and compression edit

• ar^[35] – archive and library maintainer
• gzip,^[36] gunzip,^[36] bzip2,^[36] bunzip2,^[36] compress,^[36] uncompress,^[36] zip,^[36] unzip^[36] – compress and expand data
• tar^[37] – archiver

Text processing edit

• awk – pattern-directed scanning and processing language
• cat, read – catenate files
• cmp – compare two files
• diff – differential file comparator
• doc2txt, xls2txt – extract printable strings from Microsoft Office documents
• doctype – intuit command line for formatting a document
• fmt, htmlfmt – simple text formatters
• freq – print histogram of character frequencies
• grep – search a file for a pattern
• idiff – interactive diff
• mc – multicolumn print
• p^[38] – paginate
• pr^[39] – print file
• sed – stream editor
• spell, sprog – find spelling errors
• split – split a file into pieces
• tail – deliver the last part of a file
• tcs – translate character sets
• tr – translate characters
• wc – word count
• xd – hex, octal, decimal or ASCII dump of file

Editors edit

• acme^[40] – interactive text editor and shell
• ed^[41] – text editor
• sam^[42] – screen editor with structural regular expressions

Communication, networking and remote access edit

• con, telnet, rx, xms, xmr – remote login, execution, and XMODEM file transfer
• cpu – connection to CPU server
• dial/at, dial/drain, dial/expect, dial/pass – dialer scripting tools
• netstat – summarize network connections
• replica/changes, replica/pull, replica/push, replica/scan – client–server replica management
• ssh, sshnet, scp, aux/sshserve – secure login and file copy from/to Unix or Plan 9
• tel, iwhois – look in phone book
• vncs, vncv – remote frame buffer server and viewer for Virtual Network Computing (VNC)

Email and news programs edit

• faces, seemail, vwhois – mailbox interface
• mail – mail and mailboxes
• news – print news items
• upas/filter, upas/list, upas/deliver, upas/token, upas/vf – filtering mail
• upas/fs – mail file server
• upas/marshal – formatting and sending mail
• upas/ml, upas/mlmgr, upas/mlowner – unmoderated mailing lists
• upas/nedmail – reading mail
• upas/scanmail, upas/testscan – spam filters
• upas/send – mail routing and delivery
• upas/smtp, upas/smtpd – mail transport

Network system services edit

• ip/dhcpd, ip/dhcpleases, ip/rarpd, ip/tftpd – Internet booting
• aux/listen – listen for calls on a network device
• ndb/query, ndb/mkhash, ndb/mkdb, ndb/cs, ndb/csquery, ndb/dns, ndb/dnsquery, ndb/ipquery, ndb/dnsdebug, ndb/mkhosts – network database
• upas/pop3, ip/imap4d – mail servers
• aux/timesync – NTP client

Network utilities edit

• aan – always available network
• ip/ipconfig, ip/rip – Internet configuration and routing
• ip/telnetd, ip/rlogind, ip/rexexec, ip/ftpd – Internet remote access daemons
• ip/ping, ip/gping, ip/traceroute, ip/hogports – probe the Internet
• snoopy – spy on network packets
• ip/udpecho – echo UDP packets

Security edit

• auth/aescbc, ipso, auth/secstore – secstore commands
• auth/changeuser, auth/wrkey, auth/convkeys, auth/convkeys2, auth/printnetkey, auth/status, auth/authsrv, auth/guard.srv, auth/login, auth/disable, auth/enable – maintain authentication databases
• auth/factotum, auth/fgui – authentication agent
• auth/secstored, auth/secuser – secstore commands
• delkey – delete keys from factotum

Programming tools edit

Compilers and programming tools edit

• 0a, 1a, 2a, 5a, 7a, 8a, ka, qa, va – assemblers
• 0c, 1c, 2c, 5c, 7c, 8c, kc, qc, vc – C compilers
• 0l, 1l, 2l, 5l, 7l, 8l, kl, ql, vl – loaders
• acid, truss, trump – debugger
• bc – arbitrary–precision arithmetic language
• cb – C program beautifier
• cpp – C language preprocessor
• ktrace – interpret kernel stack dumps
• leak, kmem – help find memory leaks
• mk, membername – maintain (make) related files
• patch – simple patch creation and tracking system
• pcc – APE C compiler driver
• strip – remove symbols from binary files
• syscall – test a system call
• yacc – yet another compiler-compiler

Web browsers edit

• abaco^[43] – a "lame" text-based and graphical web browser
• i – rough web browser, based on charon
• links – a text-based and graphical web browser
• mothra – a very basic web browser
• netsurf^[44] - an open-source browser with html, javascript, and css support

Desktop publishing edit

• deroff, delatex – remove formatting requests
• eqn – typeset mathematics
• gs – Aladdin Ghostscript (PostScript and PDF language interpreter)
• htmlroff – HTML formatting and typesetting
• lp – printer output
• ms2html, html2ms – convert between troff's ms macros and html
• page – view FAX, image, graphic PostScript PDF, and typesetter output files
• pic, tpic – troff and tex preprocessors for drawing pictures
• pr – print file
• ps2pdf, pdf2ps – convert between PostScript and PDF
• tbl – format tables for nroff or troff
• troff, nroff – text formatting and typesetting
• troff2html – convert troff output into HTML

Graphics and multimedia edit

• getmap,^[45] colors^[45] – display color map
• jpg,^[46] gif,^[46] png,^[46] ppm,^[46] bmp,^[46] v210,^[46] yuv,^[46] ico,^[46] togif,^[46] toppm,^[46] topng,^[46] toico^[46] – view and convert pictures

Various utilities and games edit

• astro^[47] – print astronomical information
• cal^[48] – print calendar
• calendar^[49] – print upcoming events
• clock^[50] – draws a simple analog clock
• dict^[51] – dictionary browser
• fortune^[52] – sample lines from a file
• juke,^[53] games/jukebox,^[53] games/jukefs^[53] – music jukebox
• lens^[54] – interactive screen magnifier
• map,^[55] mapdemo^[55] – draw maps on various projections
• games/playlistfs^[56] – playlist file system
• thesaurus^[57] – search online thesaurus
• scat^[58] – sky catalogue