2.11. 2017-12-25¶
2.11.1. 上节课回顾¶
2.11.2. 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 enter\n"}'
640*480
/proc/cmdline