linux中如何同时将多个连续空格和制表符转换为一个空格或者制表符

 

1、测试数据

[root@centos7 test]# ls
test.txt
[root@centos7 test]# cat test.txt
y               j     k
j                       k h
d               j      r
[root@centos7 test]# sed -n l test.txt    ## 测试数据
y\t\tj     k$
j  \t  \t \tk h$
d\t\tj      r$

 

2、将多个连续的空格或者制表符转换为一个制表符

[root@centos7 test]# ls
test.txt
[root@centos7 test]# cat test.txt
y               j     k
j                       k h
d               j      r
[root@centos7 test]# sed -n l test.txt
y\t\tj     k$
j  \t  \t \tk h$
d\t\tj      r$
[root@centos7 test]# sed 's/[\t ]\+/\t/g' test.txt | sed -n l  
y\tj\tk$
j\tk\th$
d\tj\tr$

 

3、同2，  \s 等价与[\t ]

[root@centos7 test]# ls
test.txt
[root@centos7 test]# cat test.txt
y               j     k
j                       k h
d               j      r
[root@centos7 test]# sed  -n l test.txt
y\t\tj     k$
j  \t  \t \tk h$
d\t\tj      r$
[root@centos7 test]# sed 's/\s\+/\t/g' test.txt | sed -n l   ## 转换为制表符
y\tj\tk$
j\tk\th$
d\tj\tr$
[root@centos7 test]# sed 's/\s\+/ /g' test.txt | sed -n l    ## 转换为空格
y j k$
j k h$
d j r$