Linux系列：Shell脚本中boolean类型的使用方法

Posted 2022-06-04 NIO4444

目录

​​合理的写法​​

​​有坑的写法​​

---

合理的写法

nio4444=true
if [ "$nio4444" = true ]; then
if [ "$nio4444" = "true" ]; then
if [[ "$nio4444" = true ]]; then
if [[ "$nio4444" = "true" ]]; then
if [[ "$nio4444" == true ]]; then
if [[ "$nio4444" == "true" ]]; then
if test "$nio4444" = true; then
if test "$nio4444" = "true"; then

有坑的写法

f $nio4444; then
  echo true!
fi

需要考虑nio4444未定义、为空等情况