join command joins lines of two files on a common field
join
paste
tr
cat
tac
more
less
tail
mtail
echo
stdin
column
truncate
logrotate
xzcat
pv
progress
sort
ncat
virt-cat
awk
col
fold
tee
sponge
nfs-cat
journalctl, ccat, icat, EOF
file
/usr/share/keyrings/, file --help
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