假设有文件test.txt,想把test.txt文件第三列含有的good替换为bye,并把替换后的文件保存为test_bye.txt,只需要如下命令。
test.txt
go go good go
my my go good
bye my good bye
test_bye.txt
go go bye go
my my go good
bye my bye bye
awk -F " " '{if ($3==good) $3=bye}1' test.txt > test_bye.txt
" "表示test.txt文本间用空格隔开
$3表示第三列,即good,go, good