linux中如何把多行数据变为一列数据

1、测试数据

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt   ## 测试数据
a 3 5 d
s g e z

 

2、sed 实现

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a 3 5 d
s g e z
root@PC1:/home/test2# sed 's/ /\n/g' test.txt
a
3
5
d
s
g
e
z

 

3、cat + tr实现

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a 3 5 d
s g e z
root@PC1:/home/test2# cat test.txt | tr " " "\n"
a
3
5
d
s
g
e
z

 

4、xargs实现

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a 3 5 d
s g e z
root@PC1:/home/test2# cat test.txt | xargs -n 1
a
3
5
d
s
g
e
z

 

5、awk实现

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a 3 5 d
s g e z
root@PC1:/home/test2# awk '{gsub(" ","\n"); print $0}' test.txt
a
3
5
d
s
g
e
z

 

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a 3 5 d
s g e z
root@PC1:/home/test2# awk 'BEGIN{RS = " "} {print $0}' test.txt
a
3
5
d
s
g
e
z

root@PC1:/home/test2# awk 'BEGIN{RS = " "} {print $0}' test.txt | sed '$d'
a
3
5
d
s
g
e
z

 

6、测试数据

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a35d
sgez

 

7、sed + awk实现

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a35d
sgez
root@PC1:/home/test2# cat test.txt | sed 's/./&\n/g'
a
3
5
d

s
g
e
z

root@PC1:/home/test2# cat test.txt | sed 's/./&\n/g' | awk NF
a
3
5
d
s
g
e
z

 

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a35d
sgez
root@PC1:/home/test2# sed 's/./&\n/g' test.txt
a
3
5
d

s
g
e
z

root@PC1:/home/test2# sed 's/./&\n/g' test.txt | sed '/^[\t ]*$/d'
a
3
5
d
s
g
e
z

 

8、awk实现

root@PC1:/home/test2# ls
test.txt
root@PC1:/home/test2# cat test.txt
a35d
sgez
root@PC1:/home/test2# awk -F "" '{for(i = 1; i <= NF; i++) printf("%s", $i"\n")}' test.txt
a
3
5
d
s
g
e
z