sed -i 参数调试

这里主要说bsd sed和gnu sed 对于-i的兼容处理

先给参考链接

###解决方案:

sed -i.bak “commond sequence” file

rm file.bak

###对比bsd sed 和gnu sed

1.bsd sed

sed -i “” “common sequence” file (support)

sed -i”” “common sequence” file (not support)

sed -i”suffix” “common sequence” file (support)

2.gnu sed

sed -i “” “common sequence” file (not support)

sed -i”” “common sequence” file (support)

sed -i”suffix” “common sequence” file (support)

###副作用：会产生一个备份文件,当然我的目的是直接修改文件,所以把这个备份文件视作满足兼容性的副作用产物