nRedirect output to a
log file via log[tu]= option
ut=truncate, u=unique (w/pid)
ulogs dt’s command line at top of log
nLog files are opened
in append mode (historic)
nBeware: No mounted file system checks!
nTru64 Unix & Solaris, skip first 8K to avoid overwriting the disk label (e.g. position=8k)
nSuccess exit status
is zero (0)
nGeneral failure exit
status is 255
nEnd of file/media
exit status is 254
nSignals cause
non-zero exit status too