简单Shell案例

使用shell命令进行左对齐或者右对齐

[root@bj-aws-yace-tbj mnt]# cat test.sh
#! /bin/bash

file=./test.txt

echo -e "\n左对齐\n"

while read line
do
        printf "%-30s %-10d %-10s\n" ${line}
done < ${file}

echo -e "\n右对齐\n"

while read line
do
        printf "%30s %10d %10s\n" ${line}
done < ${file}
[root@bj-aws-yace-tbj mnt]# cat test.txt
    ,,56a
   ada
  afd
[root@bj-aws-yace-tbj mnt]# sh test.sh 

左对齐

,,56a
ada
afd                                                

右对齐

                     ,,56a
                           ada
                           afd                     

使用命令进行左对齐

[root@bj-aws-yace-tbj mnt]# cat test.txt
    ,,56a
   ada
  afd
[root@bj-aws-yace-tbj mnt]# column -t test.txt
,,56a
ada
afd