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The Monster Manual
Hubert Tournier edited this page Jun 4, 2021
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34 revisions
This page lists the commands available in POSIX, along with the short description provided by the whatis(1) command, links to manual pages in POSIX and FreeBSD or Linux, FreeBSD source code, number of Single Lines of Code (without comments), languages identified, and eventual Jargon file or Wikipedia entry..
We also made a selection of commands that would be interesting to reimplement, though it's by no means a limitation to your creativity :-)
| Command | Whatis | POSIX | man | src | SLOC | Languages | Other | Comments |
|---|---|---|---|---|---|---|---|---|
| awk | pattern-directed scanning and processing language | posix | freebsd(1) | src | 0 | jargon | ||
| basename | return filename portion of pathname | posix | freebsd(1) linux(1) plan9(1) inferno(1) | src | 83 | C | wikipedia | |
| bc | arbitrary-precision decimal arithmetic language and calculator | posix | freebsd(1) | src | 57 | C | ||
| cal | displays a calendar and the date of Easter | posix | freebsd(1) | |||||
| cat | concatenate and print files | posix | freebsd(1) | src | 350 | C | jargon | |
| cksum | display file checksums and block counts | posix | freebsd(1) | src | 356 | C | ||
| cmp | compare two files | posix | freebsd(1) | src | 447 | C, Bash | ||
| comm | select or reject lines common to two files | posix | freebsd(1) | src | 168 | C, Bash | ||
| compress | compress and expand data | posix | freebsd(1) | src | 854 | C, Bash, Objective-C | jargon | |
| cp | copy files | posix | freebsd(1) | src | 710 | C, Bash | ||
| csplit | split files based on context | posix | freebsd(1) | src | 302 | C, Bash | ||
| cut | cut out selected portions of each line of a file | posix | freebsd(1) | src | 346 | C, Bash | ||
| date | display or set date and time | posix | freebsd(1) | src | 731 | C, Bash | ||
| dd | convert and copy a file | posix | freebsd(1) | src | 1419 | C, Bash | jargon | |
| df | display free disk space | posix | freebsd(1) | src | 425 | C | ||
| diff | differential file and directory comparator | posix | freebsd(1) | src | 2090 | C, Bash | jargon | |
| dirname | return directory portion of pathname | posix | freebsd(1) linux(1) | src | 40 | C | ||
| du | display disk usage statistics | posix | freebsd(1) | src | 478 | C, Bash | ||
| echo | write arguments to the standard output | posix | freebsd(1) | src | 88 | C, Bash | ||
| env | set environment and execute command, or print environment | posix | freebsd(1) | src | 401 | C | ||
| expand | expand tabs to spaces, and vice versa | posix | freebsd(1) | src | 126 | C | ||
| expr | evaluate expression | posix | freebsd(1) | src | 0 | |||
| false | return false value | posix | freebsd(1) | src | 11 | C | ||
| file | determine file type | posix | freebsd(1) | src | 0 | |||
| find | walk a file hierarchy | posix | freebsd(1) | src | 1839 | C, Bash | ||
| fold | fold long lines for finite width output device | posix | freebsd(1) | src | 164 | C, Bash | ||
| gencat | NLS catalog compiler | posix | freebsd(1) | src | 431 | C | ||
| getopts | shell builtin | posix | freebsd(1) | |||||
| grep | file pattern searcher | posix | freebsd(1) | src | 1464 | C, Bash | jargon | |
| head | display first lines of a file | posix | freebsd(1) | src | 208 | C, Bash | ||
| iconv | codeset conversion utility | posix | freebsd(1) | src | 149 | C | ||
| join | relational database operator | posix | freebsd(1) | src | 461 | C, Bash | ||
| link | link files | posix | freebsd(1) | |||||
| ln | link files | posix | freebsd(1) | src | 353 | C, Bash | ||
| locale | get locale-specific information | posix | freebsd(1) | src | 776 | C, Bash | ||
| localedef | define locale environment | posix | freebsd(1) | src | 2936 | C | ||
| logger | make entries in the system log | posix | freebsd(1) | src | 315 | C | ||
| ls | list directory contents | posix | freebsd(1) | src | 2232 | C, Bash | ||
| man | display online manual documentation pages | posix | freebsd(1) | src | 691 | Bash | ||
| mkdir | make directories | posix | freebsd(1) | src | 147 | C, Bash | ||
| more | opposite of more | posix | freebsd(1) | |||||
| mv | move files | posix | freebsd(1) | src | 543 | C, Bash | ||
| nl | line numbering filter | posix | freebsd(1) | src | 267 | C | ||
| od | octal, decimal, hex, ASCII dump | posix | freebsd(1) | |||||
| paste | merge corresponding or subsequent lines of files | posix | freebsd(1) | src | 187 | C | ||
| patch | apply a diff file to an original | posix | freebsd(1) | src | 2886 | C, Bash | jargon | |
| pathchk | check pathnames | posix | freebsd(1) | src | 114 | C | ||
| printf | formatted output | posix | freebsd(1) | src | 509 | C, Bash | ||
| pwd | return working directory name | posix | freebsd(1) | src | 60 | C | ||
| read | shell builtin | posix | freebsd(1) | |||||
| rm | remove directory entries | posix | freebsd(1) | src | 383 | C, Bash | ||
| rmdir | remove directories | posix | freebsd(1) | src | 81 | C, Bash | ||
| sed | stream editor | posix | freebsd(1) | src | 2261 | C, Bash | ||
| sh | command interpreter (shell) | posix | freebsd(1) | src | 10842 | C, Bash | ||
| sleep | suspend execution for an interval of time | posix | freebsd(1) | src | 52 | C | jargon | |
| sort | sort or merge records (lines) of text and binary files | posix | freebsd(1) | src | 4148 | C | ||
| split | split a file into pieces | posix | freebsd(1) | src | 261 | C | ||
| strings | print the strings of printable characters in files | posix | freebsd(1) | src | 0 | |||
| tail | display the last part of a file | posix | freebsd(1) | src | 1021 | C, Bash | ||
| tee | duplicate standard input | posix | freebsd(1) | src | 99 | C | jargon | |
| test | condition evaluation utility | posix | freebsd(1) | src | 599 | C, Bash | jargon | |
| time | time command execution | posix | freebsd(1) | src | 213 | C | ||
| touch | change file access and modification times | posix | freebsd(1) | src | 267 | C | ||
| tr | translate characters | posix | freebsd(1) | src | 889 | C, Bash | ||
| true | return true value | posix | freebsd(1) | src | 9 | C | ||
| tsort | topological sort of a directed graph | posix | freebsd(1) | src | 253 | C | ||
| type | shell builtin | posix | freebsd(1) | |||||
| uname | display information about the system | posix | freebsd(1) | src | 207 | C | ||
| uncompress | compress and expand data | posix | freebsd(1) | |||||
| unexpand | expand tabs to spaces, and vice versa | posix | freebsd(1) | src | 140 | C | ||
| uniq | report or filter out repeated lines in a file | posix | freebsd(1) | src | 256 | C | ||
| unlink | remove directory entries | posix | freebsd(1) | |||||
| uudecode | encode/decode a binary file | posix | freebsd(1) | src | 325 | C, Bash | ||
| uuencode | encode/decode a binary file | posix | freebsd(1) | src | 151 | C, Bash | ||
| wc | word, line, character, and byte count | posix | freebsd(1) | src | 262 | C | ||
| what | show what versions of object modules were used to construct a file | posix | freebsd(1) | src | 80 | C | ||
| xargs | construct argument list(s) and execute utility | posix | freebsd(1) | src | 570 | C, Bash | ||
| zcat | compression/decompression tool using Lempel-Ziv coding (LZ77) | posix | freebsd(1) |
The comments column gives some insight why we think that command is not relevant for reimplementation.
| Command | Whatis | POSIX | man | src | SLOC | Languages | Other | Comments |
|---|---|---|---|---|---|---|---|---|
| admin | posix | jargon | SCCS | |||||
| alias | shell builtin | posix | src | 1 | Bash | Shell builtin | ||
| ar | create, modify, and extract from archives | posix | freebsd(1) | src | 1082 | C | C dev. Maybe? | |
| asa | interpret carriage-control characters | posix | freebsd(1) | src | 77 | C | Printing | |
| at | queue, examine or delete jobs for later execution | posix | freebsd(1) | src | 1065 | C | Cron | |
| batch | queue, examine or delete jobs for later execution | posix | jargon | Cron | ||||
| bg | shell builtin | posix | freebsd(1) | Multi process | ||||
| c99 | standard C language compiler | posix | freebsd(1) | src | 66 | C | C dev | |
| cd | shell builtin | posix | Shell builtin | |||||
| cflow | generate a C-language flowgraph | posix | C dev | |||||
| chgrp | change group | posix | freebsd(1) | Multi user. Maybe? | ||||
| chmod | change file modes | posix | freebsd(1) | src | 261 | C, Bash | Multi user. Maybe? | |
| chown | change file owner and group | posix | freebsd(8) | src | 353 | C, Bash | Multi user. Maybe? | |
| command | shell builtin | posix | Shell builtin. Maybe? | |||||
| crontab | maintain crontab files for individual users (V3) | posix | freebsd(1) | Cron | ||||
| ctags | create a tags file | posix | freebsd(1) | src | 952 | C | Fortran | |
| cxref | C Cross Referencing & Documenting tool | posix | C dev | |||||
| delta | posix | jargon | SCCS | |||||
| ed | text editor | posix | freebsd(1) | src | 2216 | C, Bash, D, REBOL | jargon | Editor |
| ex | text editors | posix | freebsd(1) | Editor | ||||
| fc | shell builtin | posix | freebsd(1) | Shell builtin | ||||
| fg | shell builtin | posix | freebsd(1) | Multi process | ||||
| fort77 | posix | Fortran | ||||||
| fuser | list IDs of all processes that have one or more files open | posix | freebsd(1) | Multi process | ||||
| get | posix | SCCS | ||||||
| getconf | retrieve standard configuration variables | posix | freebsd(1) | src | 344 | C, Bash, Awk | System | |
| hash | shell builtin | posix | Shell builtin | |||||
| id | return user identity | posix | freebsd(1) | src | 343 | C | Multi user | |
| ipcrm | remove the specified message queues, semaphore sets, and shared segments | posix | freebsd(1) | src | 199 | C | IPC | |
| ipcs | report System V interprocess communication facilities status | posix | freebsd(1) | src | 565 | C | IPC | |
| jobs | shell builtin | posix | freebsd(1) | Multi process | ||||
| kill | terminate or signal a process | posix | freebsd(1) | src | 130 | C | Multi process | |
| lex | fast lexical analyzer generator | posix | freebsd(1) | src | 5122 | C, Awk | Dev | |
| logname | display user's login name | posix | freebsd(1) | src | 29 | C | Multi user | |
| lp | print files | posix | Printing | |||||
| m4 | macro language processor | posix | freebsd(1) | src | 2433 | C, Bash | Dev | |
| mailx | send and receive mail | posix | freebsd(1) | App | ||||
| make | maintain program dependencies | posix | freebsd(1) | Dev. Maybe? | ||||
| mesg | display (do not display) messages from other users | posix | freebsd(1) | src | 56 | C | Multi user | |
| mkfifo | make fifos | posix | freebsd(1) | src | 59 | C | ||
| newgrp | change to a new group | posix | freebsd(1) | src | 200 | C | Multi user | |
| nice | execute a utility at an altered scheduling priority | posix | freebsd(1) | src | 58 | C | Multi process | |
| nm | list symbols from object files | posix | src | 0 | ||||
| nohup | invoke a utility immune to hangups | posix | freebsd(1) | src | 66 | C | Multi process | |
| pax | read and write file archives and copy directory hierarchies | posix | freebsd(1) | src | 6802 | C, Perl | App. Maybe? | |
| pr | print files | posix | freebsd(1) | src | 1223 | C, Bash | Printing | |
| prs | posix | SCCS | ||||||
| ps | process status | posix | freebsd(1) | src | 2028 | C | Multi process. Maybe? | |
| qalter | posix | Cron | ||||||
| qdel | posix | Cron | ||||||
| qhold | posix | Cron | ||||||
| qmove | posix | Cron | ||||||
| qmsg | posix | Cron | ||||||
| qrerun | posix | Cron | ||||||
| qrls | posix | Cron | ||||||
| qselect | posix | Cron | ||||||
| qsig | posix | Cron | ||||||
| qstat | posix | Cron | ||||||
| qsub | posix | Cron | ||||||
| renice | alter priority of running processes | posix | freebsd(8) | src | 109 | C | Multi process | |
| rmdel | posix | SCCS | ||||||
| sact | posix | SCCS | ||||||
| sccs | front end for the SCCS subsystem | posix | SCCS | |||||
| strip | discard symbols and other data from object files | posix | Dev | |||||
| stty | set the options for a terminal device interface | posix | freebsd(1) | src | 875 | C | Terminal | |
| tabs | set terminal tabs | posix | freebsd(1) | src | 147 | C | Terminal | |
| talk | talk to another user | posix | freebsd(1) | src | 835 | C | Multi user | |
| tput | terminal capability interface | posix | freebsd(1) | src | 137 | C, Bash | Terminal | |
| tty | return user's terminal name | posix | freebsd(1) | src | 34 | C | jargon | Multi user |
| ulimit | shell builtin | posix | System | |||||
| umask | shell builtin | posix | Shell builtin | |||||
| unalias | shell builtin | posix | freebsd(1) | Shell builtin | ||||
| unget | posix | SCCS | ||||||
| uucp | posix | UUCP | ||||||
| uustat | posix | UUCP | ||||||
| uux | posix | UUCP | ||||||
| val | posix | SCCS | ||||||
| vi | text editors | posix | freebsd(1) | src | 21 | C | jargon | Editor |
| wait | shell builtin | posix | Multi process | |||||
| who | display who is on the system | posix | freebsd(1) | src | 217 | C | Multi user | |
| write | send a message to another user | posix | freebsd(1) | src | 218 | C | Multi user | |
| yacc | an LALR(1) parser generator | posix | freebsd(1) | src | 6 | Bash | Dev |