Syntax And Usages

*Tags*: cmd:if, cmd:while

if [ x"$@" = x"" ] ; then cmtc='-nc' ; elif ...; then ...; else cmtc='-c'; fi
if diff -wu f1 f2 > $tf.diff 2>&1; then echo a; else echo b; fi

for ii in `jot $n`; do
for attr in 0 1 4 5 7 ; do

while [ "${DIRSTACK[1]}" ] ; do popd +1 > /dev/null 2>&1 ; done

while expr `netstat -a | grep ":www" | wc -l` '>' $ipm ; do :; done
while :; do ...

while read line; do
        echo postinstall: $line
done

	no ";" after 'then' & 'do'!

/usr/bin/cal |
  # bold today
  sed -e "s/^/ /; s/$/ /; s/ $4 /$bold $4 $unbold/"