Commands difficulty ranking in levels

[HubTou]

I've made a proposal for commands difficulty ranking in levels but it's highly debatable.
If you feel I should modify the order of things, please discuss it here.

[HubTou]

I made a little script to analyze the volume of Source Line of Code (SLOC) of utilities in the FreeBSD source code, using pygount and pygments programming languages support. While quantity is unrelated to difficulty, it still gives some ideas for ranking commands, at least by the effort needed to code them.

Here's what it says for the subset of userland commands within /usr/src/bin, /usr/src/contrib, and /usr/src/usr.bin:

SLOC	Languages	Utility
0		/usr/src/bin/expr
0		/usr/src/bin/freebsd-version
0		/usr/src/bin/rmail
0		/usr/src/bin/tests
0		/usr/src/contrib/openresolv
0		/usr/src/contrib/terminus
0		/usr/src/usr.bin/addr2line
0		/usr/src/usr.bin/atm
0		/usr/src/usr.bin/awk
0		/usr/src/usr.bin/bzip2
0		/usr/src/usr.bin/bzip2recover
0		/usr/src/usr.bin/compile_et
0		/usr/src/usr.bin/cxxfilt
0		/usr/src/usr.bin/drill
0		/usr/src/usr.bin/ee
0		/usr/src/usr.bin/file
0		/usr/src/usr.bin/gh-bc
0		/usr/src/usr.bin/host
0		/usr/src/usr.bin/kyua
0		/usr/src/usr.bin/ldd32
0		/usr/src/usr.bin/lessecho
0		/usr/src/usr.bin/lesskey
0		/usr/src/usr.bin/lzmainfo
0		/usr/src/usr.bin/mandoc
0		/usr/src/usr.bin/minigzip
0		/usr/src/usr.bin/mkcsmapper_static
0		/usr/src/usr.bin/mkesdb_static
0		/usr/src/usr.bin/nc
0		/usr/src/usr.bin/nm
0		/usr/src/usr.bin/objcopy
0		/usr/src/usr.bin/ofed
0		/usr/src/usr.bin/opieinfo
0		/usr/src/usr.bin/opiekey
0		/usr/src/usr.bin/opiepasswd
0		/usr/src/usr.bin/pamtest
0		/usr/src/usr.bin/readelf
0		/usr/src/usr.bin/size
0		/usr/src/usr.bin/smbutil
0		/usr/src/usr.bin/strings
0		/usr/src/usr.bin/telnet
0		/usr/src/usr.bin/tests
0		/usr/src/usr.bin/unvis
0		/usr/src/usr.bin/vacation
0		/usr/src/usr.bin/vis
0		/usr/src/usr.bin/xolint
0		/usr/src/usr.bin/xopo
0		/usr/src/usr.bin/xz
0		/usr/src/usr.bin/xzdec
0		/usr/src/usr.bin/zstd
1	Bash	/usr/src/usr.bin/alias
1	Bash	/usr/src/usr.bin/clang
2	Bash	/usr/src/usr.bin/pagesize
6	Bash	/usr/src/usr.bin/yacc
8	C	/usr/src/usr.bin/mkesdb
9	C	/usr/src/usr.bin/true
10	C	/usr/src/usr.bin/mkcsmapper
11	C	/usr/src/usr.bin/false
13	Bash	/usr/src/usr.bin/bsdcat
13	Bash	/usr/src/usr.bin/cpio
13	Bash	/usr/src/usr.bin/tar
14	C	/usr/src/bin/sync
20	C	/usr/src/usr.bin/keylogout
20	C	/usr/src/usr.bin/revoke
21	C	/usr/src/usr.bin/vi
29	C	/usr/src/usr.bin/logname
29	C	/usr/src/usr.bin/perror
30	Bash	/usr/src/usr.bin/lorder
30	Bash	/usr/src/usr.bin/xo
31	C	/usr/src/usr.bin/getopt
32	C++	/usr/src/usr.bin/users
33	Bash	/usr/src/usr.bin/shar
34	C	/usr/src/usr.bin/tty
35	C	/usr/src/usr.bin/fsync
35	C	/usr/src/usr.bin/keylogin
40	C	/usr/src/bin/domainname
40	C	/usr/src/bin/realpath
40	C	/usr/src/usr.bin/dirname
40	C	/usr/src/usr.bin/yes
46	C	/usr/src/usr.bin/c89
48	C	/usr/src/usr.bin/printenv
52	C	/usr/src/bin/sleep
56	Bash	/usr/src/usr.bin/ssh-copy-id
56	C	/usr/src/usr.bin/mesg
57	C	/usr/src/usr.bin/bc
58	C	/usr/src/bin/hostname
58	C	/usr/src/usr.bin/nice
59	Bash	/usr/src/usr.bin/xohtml
59	C	/usr/src/usr.bin/mkfifo
60	C	/usr/src/bin/pwd
60	C	/usr/src/usr.bin/biff
62	C	/usr/src/usr.bin/rev
64	C	/usr/src/usr.bin/stdbuf
66	C	/usr/src/usr.bin/c99
66	C	/usr/src/usr.bin/nohup
68	C	/usr/src/usr.bin/lsvfs
69	C	/usr/src/usr.bin/hesinfo
75	C	/usr/src/usr.bin/protect
76	C	/usr/src/bin/uuidgen
77	C, Bash	/usr/src/usr.bin/caesar
77	C	/usr/src/usr.bin/asa
77	C	/usr/src/usr.bin/ypmatch
78	C	/usr/src/usr.bin/ypcat
79	C, Bash	/usr/src/usr.bin/file2c
80	C	/usr/src/usr.bin/what
81	C, Bash	/usr/src/bin/rmdir
83	C	/usr/src/usr.bin/basename
83	C	/usr/src/usr.bin/which
84	C	/usr/src/contrib/unvis
84	C	/usr/src/usr.bin/colrm
87	C	/usr/src/usr.bin/mktemp
88	Bash	/usr/src/usr.bin/mkdep
88	C, Bash	/usr/src/bin/echo
88	C	/usr/src/usr.bin/resizewin
91	C	/usr/src/usr.bin/rwall
96	C	/usr/src/usr.bin/passwd
99	C	/usr/src/usr.bin/tee
106	C	/usr/src/usr.bin/from
109	C	/usr/src/usr.bin/renice
112	C	/usr/src/usr.bin/enigma
113	C	/usr/src/usr.bin/leave
114	C	/usr/src/usr.bin/pathchk
122	C, Bash	/usr/src/usr.bin/less
126	C	/usr/src/usr.bin/expand
129	C	/usr/src/usr.bin/lockf
130	C	/usr/src/bin/kill
135	C	/usr/src/usr.bin/ftp
137	C, Bash	/usr/src/usr.bin/tput
140	C	/usr/src/bin/kenv
140	C	/usr/src/usr.bin/unexpand
147	C, Bash	/usr/src/bin/mkdir
147	C	/usr/src/bin/csh
147	C	/usr/src/usr.bin/tabs
149	C	/usr/src/usr.bin/cap_mkdb
149	C	/usr/src/usr.bin/iconv
150	C	/usr/src/usr.bin/rup
151	C, Bash	/usr/src/usr.bin/uuencode
151	C	/usr/src/usr.bin/brandelf
153	C	/usr/src/usr.bin/pom
156	C, Bash	/usr/src/usr.bin/apply
163	C	/usr/src/usr.bin/backlight
163	C	/usr/src/usr.bin/setchannel
164	C, Bash	/usr/src/usr.bin/fold
164	C	/usr/src/usr.bin/rusers
165	C, Bash	/usr/src/usr.bin/soelim
165	C	/usr/src/usr.bin/lam
168	C, Bash	/usr/src/usr.bin/comm
168	C	/usr/src/usr.bin/rwho
169	C, Bash	/usr/src/usr.bin/ident
173	C, Bash	/usr/src/bin/chflags
176	C	/usr/src/usr.bin/number
177	C	/usr/src/usr.bin/chkey
182	C	/usr/src/usr.bin/ypwhich
185	C	/usr/src/usr.bin/grdc
185	C	/usr/src/usr.bin/look
187	C	/usr/src/usr.bin/paste
199	C	/usr/src/usr.bin/ipcrm
200	C	/usr/src/usr.bin/newgrp
205	C	/usr/src/contrib/vis
205	C	/usr/src/usr.bin/lock
207	C	/usr/src/usr.bin/uname
208	C, Bash	/usr/src/usr.bin/head
209	C	/usr/src/contrib/mknod
210	C	/usr/src/usr.bin/mkstr
213	C	/usr/src/usr.bin/time
217	C	/usr/src/usr.bin/who
218	C	/usr/src/usr.bin/write
223	C	/usr/src/usr.bin/ruptime
228	C, Awk	/usr/src/usr.bin/getaddrinfo
229	C	/usr/src/bin/getfacl
233	C	/usr/src/usr.bin/tcopy
235	C	/usr/src/usr.bin/ktrace
240	C	/usr/src/usr.bin/factor
242	C	/usr/src/usr.bin/column
253	C	/usr/src/usr.bin/tsort
256	C	/usr/src/usr.bin/uniq
261	C, Bash	/usr/src/bin/chmod
261	C	/usr/src/usr.bin/etdump
261	C	/usr/src/usr.bin/split
262	C	/usr/src/usr.bin/wc
267	C	/usr/src/usr.bin/nl
267	C	/usr/src/usr.bin/touch
278	C	/usr/src/usr.bin/logins
286	C	/usr/src/usr.bin/ktrdump
288	C	/usr/src/usr.bin/elfctl
292	C	/usr/src/usr.bin/showmount
295	C	/usr/src/usr.bin/wall
296	C	/usr/src/usr.bin/random
301	C	/usr/src/usr.bin/proccontrol
302	C, Bash	/usr/src/usr.bin/csplit
315	C	/usr/src/usr.bin/logger
318	C, Bash	/usr/src/usr.bin/seq
325	C, Bash	/usr/src/usr.bin/uudecode
327	C	/usr/src/usr.bin/ldd
332	C	/usr/src/usr.bin/cpuset
335	C	/usr/src/usr.bin/morse
343	C	/usr/src/usr.bin/id
343	C	/usr/src/usr.bin/xstr
344	C, Bash, Awk	/usr/src/usr.bin/getconf
346	C, Bash	/usr/src/usr.bin/cut
347	C	/usr/src/usr.bin/killall
350	C	/usr/src/bin/cat
353	C, Bash	/usr/src/bin/ln
353	C	/usr/src/contrib/libc-pwcache
356	C	/usr/src/usr.bin/cksum
357	Bash, C	/usr/src/bin/pwait
359	Bash, C	/usr/src/usr.bin/truncate
361	C	/usr/src/contrib/libexecinfo
365	C	/usr/src/usr.bin/dpv
379	C, Bash	/usr/src/usr.bin/lastcomm
383	C, Bash	/usr/src/bin/rm
386	C	/usr/src/usr.bin/fmt
386	C	/usr/src/usr.bin/usbhidaction
391	C, Bash	/usr/src/usr.bin/timeout
401	C	/usr/src/usr.bin/env
401	C	/usr/src/usr.bin/posixshmcontrol
402	C	/usr/src/usr.bin/script
412	C	/usr/src/usr.bin/usbhidctl
415	C	/usr/src/usr.bin/last
419	C	/usr/src/usr.bin/whois
424	C	/usr/src/usr.bin/ul
425	C	/usr/src/bin/df
426	C	/usr/src/usr.bin/su
431	C	/usr/src/usr.bin/gencat
432	C	/usr/src/usr.bin/newkey
434	C	/usr/src/contrib/com_err
439	C	/usr/src/contrib/pnpinfo
443	C, Bash	/usr/src/usr.bin/jot
447	C, Bash	/usr/src/usr.bin/cmp
452	C	/usr/src/usr.bin/rctl
457	C	/usr/src/usr.bin/whereis
461	C, Bash	/usr/src/usr.bin/join
470	C	/usr/src/contrib/libbegemot
471	C	/usr/src/contrib/pnglite
478	C, Bash	/usr/src/usr.bin/du
484	C, Bash	/usr/src/usr.bin/col
485	C	/usr/src/usr.bin/quota
489	C	/usr/src/usr.bin/getent
505	C	/usr/src/usr.bin/bsdiff
509	C, Bash	/usr/src/usr.bin/printf
519	C	/usr/src/usr.bin/w
520	C, Bash	/usr/src/usr.bin/diff3
535	C, Bash	/usr/src/usr.bin/rs
535	C	/usr/src/usr.bin/ministat
543	C, Bash	/usr/src/bin/mv
555	C	/usr/src/usr.bin/ctlstat
557	Bash, C	/usr/src/usr.bin/bmake
565	C	/usr/src/usr.bin/ipcs
570	C, Bash	/usr/src/usr.bin/xargs
574	C, Bash	/usr/src/usr.bin/limits
599	C, Bash	/usr/src/bin/test
611	C	/usr/src/usr.bin/msgs
637	C	/usr/src/usr.bin/unzip
643	C, Bash	/usr/src/usr.bin/units
646	Awk, Bash, Perl	/usr/src/contrib/tzdata
691	Bash	/usr/src/usr.bin/man
704	C	/usr/src/usr.bin/chpass
710	C, Bash	/usr/src/bin/cp
731	C, Bash	/usr/src/bin/date
738	C	/usr/src/usr.bin/tset
740	C	/usr/src/usr.bin/fstat
764	C	/usr/src/bin/setfacl
776	C, Bash	/usr/src/usr.bin/locale
777	C	/usr/src/bin/chio
780	C	/usr/src/usr.bin/login
797	C	/usr/src/contrib/pam_modules
800	C	/usr/src/usr.bin/vtfontcvt
801	C	/usr/src/contrib/ldns-host
803	C, Bash	/usr/src/usr.bin/ncal
832	C	/usr/src/usr.bin/bluetooth
835	C	/usr/src/usr.bin/nfsstat
835	C	/usr/src/usr.bin/talk
837	C	/usr/src/usr.bin/fetch
851	C	/usr/src/usr.bin/sdiotool
854	C, Bash, Objective-C	/usr/src/usr.bin/compress
857	C	/usr/src/usr.bin/gcore
859	C, Bash	/usr/src/usr.bin/locate
875	C	/usr/src/bin/stty
878	C	/usr/src/usr.bin/tftp
884	C, Objective-C	/usr/src/contrib/libc-vis
889	C, Bash	/usr/src/usr.bin/tr
898	C, Bash	/usr/src/usr.bin/sdiff
919	C, Bash	/usr/src/usr.bin/vgrind
922	C, Objective-C	/usr/src/usr.bin/svn
952	C	/usr/src/usr.bin/ctags
960	C	/usr/src/usr.bin/iscsictl
963	C, Bash	/usr/src/usr.bin/stat
967	C	/usr/src/usr.bin/mkuzip
978	C	/usr/src/usr.bin/chat
989	C	/usr/src/usr.bin/elfdump
1021	C, Bash	/usr/src/usr.bin/tail
1065	C	/usr/src/usr.bin/at
1066	C	/usr/src/usr.bin/finger
1082	C	/usr/src/usr.bin/ar
1086	C	/usr/src/usr.bin/banner
1089	C	/usr/src/contrib/hyperv
1138	C	/usr/src/usr.bin/mt
1145	C, Bash	/usr/src/usr.bin/unifdef
1148	C	/usr/src/usr.bin/sockstat
1160	C	/usr/src/usr.bin/primes
1222	C	/usr/src/usr.bin/rpcinfo
1223	C, Bash	/usr/src/usr.bin/pr
1309	C	/usr/src/contrib/netcat
1309	C	/usr/src/usr.bin/vmstat
1329	C, Python	/usr/src/usr.bin/fortune
1353	C, Bash	/usr/src/usr.bin/xinstall
1418	C, Bash	/usr/src/usr.bin/hexdump
1419	C, Bash	/usr/src/bin/dd
1450	C	/usr/src/contrib/ngatm
1464	C, Bash	/usr/src/usr.bin/grep
1484	Bash, C	/usr/src/bin/pkill
1635	C	/usr/src/contrib/libdivsufsort
1738	C, Bash	/usr/src/contrib/pjdfstest
1839	C, Bash	/usr/src/usr.bin/find
1853	C, Awk	/usr/src/contrib/traceroute
1855	C	/usr/src/usr.bin/kdump
2017	C	/usr/src/usr.bin/gprof
2028	C	/usr/src/bin/ps
2032	C++, Bash	/usr/src/contrib/lutok
2090	C, Bash	/usr/src/usr.bin/diff
2124	C, Bash	/usr/src/usr.bin/dc
2216	C, Bash, D, REBOL	/usr/src/bin/ed
2224	S, C, Python, Bash	/usr/src/contrib/cortex-strings
2232	C, Bash	/usr/src/bin/ls
2261	C, Bash	/usr/src/usr.bin/sed
2284	C, Bash	/usr/src/usr.bin/procstat
2433	C, Bash	/usr/src/usr.bin/m4
2464	C, Bash, Prolog	/usr/src/usr.bin/indent
2505	C, Objective-C, Bash	/usr/src/contrib/dma
2667	C, Bash	/usr/src/usr.bin/calendar
2753	C	/usr/src/usr.bin/gzip
2886	C, Bash	/usr/src/usr.bin/patch
2889	C	/usr/src/contrib/mtree
2936	C	/usr/src/usr.bin/localedef
3221	C++	/usr/src/usr.bin/dtc
3224	C	/usr/src/usr.bin/top
3249	C, Bash	/usr/src/usr.bin/mkimg
3263	C	/usr/src/usr.bin/truss
3469	C	/usr/src/contrib/blacklist
3617	C	/usr/src/contrib/tcp_wrappers
3889	C	/usr/src/usr.bin/tip
3894	C	/usr/src/contrib/smbfs
4076	C	/usr/src/usr.bin/rpcgen
4148	C	/usr/src/usr.bin/sort
4634	C, C++	/usr/src/contrib/libcxxrt
4673	C	/usr/src/contrib/tzcode
4788	C	/usr/src/contrib/bzip2
4795	C	/usr/src/usr.bin/systat
5079	C, Awk	/usr/src/contrib/one-true-awk
5122	C, Awk	/usr/src/usr.bin/lex
5392	C	/usr/src/contrib/pf
5672	C	/usr/src/usr.bin/mail
5889	C++, C	/usr/src/contrib/capsicum-test
6030	C, Perl, Bash	/usr/src/contrib/openpam
6065	C	/usr/src/usr.bin/netstat
6254	C, Bash	/usr/src/contrib/flex
6610	C	/usr/src/contrib/ee
6802	C, Perl	/usr/src/bin/pax
6812	C	/usr/src/contrib/opie
6871	C, Objective-C	/usr/src/contrib/gdtoa
8084	C, Python	/usr/src/contrib/serf
8203	C	/usr/src/contrib/diff
8286	C	/usr/src/contrib/tnftp
9560	C, Python	/usr/src/contrib/lib9p
10842	C, Bash	/usr/src/bin/sh
12731	C, Objective-C, Python, Haskell, Bash, Lua, C++	/usr/src/contrib/libucl
13067	C	/usr/src/contrib/libedit
13688	C, Bash, Python	/usr/src/contrib/bc
14463	C	/usr/src/contrib/telnet
14586	C, Python	/usr/src/contrib/file
15513	C++, C	/usr/src/contrib/opencsd
15707	C, Objective-C	/usr/src/contrib/less
15968	C, Bash	/usr/src/contrib/xz
16285	C, C++, Bash	/usr/src/contrib/atf
16382	C, JavaScript, CSS+Lasso, Perl, Bash, JavaScript+Genshi, Python	/usr/src/contrib/libxo
16721	C, Perl, Python, Bash	/usr/src/contrib/dialog
16722	C, Objective-C, CSS+Lasso, C++	/usr/src/contrib/lua
17076	C, Bash, Python, Objective-C	/usr/src/contrib/bmake
19856	C, Bash	/usr/src/contrib/openbsm
20092	C, C++, Bash, CSS+Lasso, Python	/usr/src/contrib/expat
24098	C, Objective-C, C++	/usr/src/contrib/processor-trace
24240	C, Objective-C, Perl	/usr/src/contrib/apr
24824	C	/usr/src/contrib/jemalloc
26326	C, Objective-C	/usr/src/contrib/apr-util
26920	C, Awk	/usr/src/contrib/nvi
26983	C, Objective-C, Bash	/usr/src/contrib/ldns
30807	C, Igor, Scilab	/usr/src/contrib/ipfilter
31205	C, C++, Bash	/usr/src/contrib/bsnmp
31676	C, CSS+Lasso	/usr/src/contrib/mandoc
36868	C++, Bash, SQL, Awk, Transact-SQL, CSS+Lasso	/usr/src/contrib/kyua
37049	C, Objective-C, NASM	/usr/src/contrib/libpcap
40933	C, Tcsh, EmacsLisp	/usr/src/contrib/tcsh
44765	C, C#, Bash	/usr/src/contrib/bearssl
46323	C, Bash	/usr/src/contrib/elftoolchain
46922	C, Awk, Bash, Prolog	/usr/src/contrib/ncurses
47062	C++, Python, C, Objective-C, Bash	/usr/src/contrib/googletest
47669	C, Python, Bash	/usr/src/contrib/libevent
68638	C, Awk	/usr/src/contrib/tcpdump
80392	C, Bash, Objective-C, Perl, Awk, Python	/usr/src/contrib/unbound
84402	C, Perl, Objective-C, Bash	/usr/src/contrib/sendmail
84795	C, Bash	/usr/src/contrib/byacc
105996	C, Bash, S, C++, Objective-C, Limbo, Igor, Awk, Logos	/usr/src/contrib/netbsd-tests
124779	C, Objective-C, C#, Nemerle	/usr/src/contrib/sqlite3
128455	C, Objective-C, C++	/usr/src/contrib/ofed
129134	C, Objective-C	/usr/src/contrib/libarchive
199159	C, Python, Objective-C, Perl, Ruby, Bash, Awk, Smarty, CSS+Lasso, Prolog, S	/usr/src/contrib/ntp
295713	C, Python, Objective-C, C++, Bash	/usr/src/contrib/wpa
305910	C, Objective-C, SQL, Python, C++, Bash	/usr/src/contrib/subversion
2711347	C++, C, Objective-C, S, Lasso, NASM, CSS+Lasso, Bash, Python	/usr/src/contrib/llvm-project