刪除空白行,或者只有空格或TAB的行
sed -i '/^[ \t]*$/d' filename
awk '/^[ \t]*$/{next}{print > filename}' filename
刪除空白行,或者只有空格或TAB的行
sed -i '/^[ \t]*$/d' filename
awk '/^[ \t]*$/{next}{print > filename}' filename
shell腳本 #!/bin/bash for ((i=1;i<=9;i++)) do for ((j=1;j<=i;j++)) do printf "%d * %d =
shell腳本 #!/bin/bash for ((i=1;i<=9;i++)) do for ((j=1;j<=i;j++)) do printf "%d * %d =