The djbwares toolset comprises these commands. See their manual pages for documentation.
addcr — insert a CR before each LF
argv0 — run a program with a specified 0th argument.
axfr-get — perform an old-style "zone transfer" database replication
axfrdns — UCSPI-TCP general-purpose content DNS server
background — run a program without waiting for it
clockadd — adjust the local UNIX clock, once
clockspeed — speed up or slow down the local clock, continuously
clockview — convert an adjustment to the local clock into human-readable form
date@ — UCSPI-TCP DAYTIME client
delcr — delete any CR before an LF
dnscache-showctl — dump a dnscache service configuration
dnscache — a caching proxy DNS server
dnsfilter — filter a stream, looking up the domain names of any IP addresses
dnsip — look up the IP address(es) for a domain name
dnsipq — look up the IP address(es) for a domain name after applying name qualification
dnsmx — look up the mail exchanger names and weightings for a domain name
dnsname — look up the domain name for an IP address
dnsnamex — look up the domain name for an IP address
dnsq — query a content DNS server using the DNS protocol
dnsqr — query a proxy DNS server using the DNS protocol
dnsqrx — query a proxy DNS server using the DNS protocol
dnstrace — diagnose DNS query resolution problems
dnstracesort — translate the output of dnstrace into human-readable form
dnstxt — look up the text resource records for a domain name
easter — print the date of Easter in one or more years
envdir — run another program with environment modified according to files in a specified directory.
envuidgid — run another program with environment variables indicating a
excloff — stop reserving a terminal device for exclusive use
exclon — start reserving a terminal device for exclusive use
fghack — an anti-backgrounding tool
finger@ — UCSIP-TCP FINGER client
fixcrio — insert missing CRs at the ends of lines in both input and output
ftpd — UCSPI-TCP FTP server for static content
gopherd — UCSPI-TCP GOPHER server for static content
host — query a proxy/content DNS server using the DNS protocol
http@ — UCSIP-TCP HTTP client
httpd — UCSPI-TCP HTTP server for static content
leapsecs — compile the leap seconds table used by the Bernstein TAI library
mconnect-io — converse with a line-protocol network server
mconnect — connect to and converse with a line-protocol server over the network
multilog — read a sequence of lines from stdin and append selected lines to any number of logs
nobuf — run a program such that the C library does not attempt stdio block buffering
nowutc — print the current UTC time
pgrphack — run a program in a separate process group
pickdns-data — compile the database used by pickdns
pickdns — an obsolete special-purpose content DNS server using the UDP protocol
ptybandage — wrap a transparent pseudo-terminal around a program
ptyget — allocate a pseudo-terminal
ptyio — feed input to a pseudo-terminal and print its output
ptyrun — wrap a pseudo-terminal around a program
ptyspawn — run a program on a pseudo-terminal
random-ip — generate randomly-chosen IPv4 addresses
rbldns-data — compile the database used by rbldns
rbldns — an RBL source content DNS server using the UDP protocol
rblsmtpd — wrap a UCSPI-TCP SMTP server with RBL checks
recordio — record the input and output of a program
setlock — run another program with a file locked
setuidgid — run another program under a specified account's uid and gid
sntpclock — check a system's clock through NTP
softlimit — run another program with new resource limits.
supervise — start and monitors a service.
svc — control services monitored by supervise
svok — check whether supervise is running
svscan — start and monitor a collection of services
svstat — print the status of services monitored byi supervise
tai64n — put a precise timestamp on each line
tai64nlocal — convert precise TAI64N timestamps to a human-readable format
taiclock — check a system's clock through TAICLOCK
taiclockd — announce the system's clock through TAICLOCK
tcpcat — general-purpose empty-request UCSPI-TCP client
tcpclient — create an outgoing TCP connection
tcprules — compile rules for tcpserver
tcprulescheck — check tcprules
tcpserver — accept incoming TCP connections
tinydns-data — compile the database used by tinydns
tinydns-edit — modify a tinydns-data source file
tinydns-get — query a content DNS server by reading its database directly
tinydns-showctl — dump a tinydns service configuration
tinydns — a general-purpose content DNS server using the UDP protocol
ttydetach — run a program without a controlling terminal
walldns — an opaque content DNS server using the UDP protocol
who@ — UCSPI-TCP SYSTAT client
yearcal — print a calendar for one or more years