${string::N}提取前N个字符，${string:N}提取N个之后的字符 # cat ./test.sh
#!/bin/bash
test=1234567898453613025
num_test=`echo ${#test}`
num=$[num_test/4 + 1 ]
for i in `seq $num`
do
echo -ne "${test::4}"
test=`echo ${test:4}`
echo
done
# ./test.sh 1234 5678 9845 3613 025 转载请保留固定链接： https://linuxeye.com/program/1565.html |