23-2017-12-25

上节课回顾

本节内容

::

${#var} ${var:offset:length} ${var: -length}

${var#*str} ${var##*str} readonly =declare -r

eval

title=ceo ceo=mage echo ${!title}

mktemp

install

expect -c ‘expect “n” {send “pressed entern”}’

640*480

/proc/cmdline