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$ man -S 1 -k hex dump
hexchat (1)          - IRC Client
aseqdump (1)         - show the events received at an ALSA sequenc...
bsondump (1)         - MongoDB BSON utility
c2ph (1)             - Dump C structures as generated from "cc - g...
cpanfile-dump (1p)   - Dump prerequisites from a cpanfile
dbicdump (1p)        - Dump a schema using DBIx::Class::Schema::Lo...
devdump (1)          - Utility programs for dumping and verifying ...
djvudump (1)         - Display internal structure of DjVu files.
iccdump (1)          - Dump an ICC file in human readable form.
dumpkeys (1)         - dump keyboard translation tables
gsf-vba-dump (1)     - extract Visual Basic for Applications macros
hd (1)               - ASCII, decimal, hexadecimal, octal dump
hex2hcd (1)          - firmware converter
hexdump (1)          - ASCII, decimal, hexadecimal, octal dump
iecset (1)           - Set or dump IEC958 status bits
intel_aubdump (1)    - Launch an application and capture rendering...
intel_audio_dump (1) - Dumps the Intel GPU registers for HDMI audi...
intel_bios_dumper (1) - Saves the Intel video BIOS contents to a f...
intel_error_decode (1) - Decodes an Intel GPU dump automatically c...
intel_gtt (1)        - Dump the contents of an Intel GPU's GTT
isodump (1)          - Utility programs for dumping and verifying ...
isoinfo (1)          - Utility programs for dumping and verifying ...
isovfy (1)           - Utility programs for dumping and verifying ...
lwp-dump (1p)        - See what headers and content is returned fo...
mcat (1)             - dump raw disk image
mech-dump (1p)       - Dumps information about a web page
mongodump (1)        - MongoDB
mymeta-cpanfile (1p) - Dump cpanfile out of (MY)META files
objdump (1)          - display information from object files.
od (1)               - dump files in octal and other formats
pg_dump (1)          - extract a PostgreSQL database into a script...
pg_dumpall (1)       - extract a PostgreSQL database cluster into ...
pg_restore (1)       - restore a PostgreSQL database from an archi...
pg_xlogdump (1)      - display a human-readable rendering of the w...
pnmtoxwd (1)         - convert a portable anymap into an X11 windo...
pstruct (1)          - Dump C structures as generated from "cc - g...
screendump (1)       - dump the contents of a virtual console to s...
showfont (1)         - font dumper for X font server
sqlt-dumper (1p)     - create a dumper script from a schema
svndumpfilter (1)    - Filter a subversion repository 'dumpfile'.
svnrdump (1)         - Subversion remote repository dumper and loa...
tiffdump (1)         - print verbatim information about TIFF files
timage (1)           - Create test images, default hex RGB surface...
ttfdump (1)          - Dumping the contents of a TrueType Font file
utmpdump (1)         - dump UTMP and WTMP files in raw format
xwd (1)              - dump an image of an X window
xwdtopnm (1)         - convert a X11 or X10 window dump file into ...
xxd (1)              - make a hexdump or do the reverse.