[root@localhost awk]# seq 10|xargs -n 2 > file
[root@localhost awk]# seq 10 -1 1|xargs -n 2 > file1
[root@localhost awk]# cat file
1 2
3 4
5 6
7 8
9 10
[root@localhost awk]# cat file1
10 9
8 7
6 5
4 3
2 1
[root@localhost awk]# cat file |awk '{print $1}'
1
3
5
7
9
[root@localhost awk]# cat file1 |awk '{print $2}'
9
7
5
3
1
[root@localhost awk]# cat file |awk '{print $1}'>file3
[root@localhost awk]# cat file1 |awk '{print $2}'>file4
[root@localhost awk]# paste file3 file4
1 9
3 7
5 5
7 3
9 1
[root@localhost awk]# paste file3 file4|tr "\t" " "
1 9
3 7
5 5
7 3
9 1
[root@localhost awk]# paste file3 file4|tr "\t" " ">file5
[root@localhost awk]# cat file5
1 9
3 7
5 5
7 3
9 1
[root@localhost awk]# awk '1' file
1 2
3 4
5 6
7 8
9 10
[root@localhost awk]# awk '1' file1
10 9
8 7
6 5
4 3
2 1
[root@localhost awk]# awk '1' file1 file1
10 9
8 7
6 5
4 3
2 1
10 9
8 7
6 5
4 3
2 1
[root@localhost awk]# awk '{print NR}' file file1
1
2
3
4
5
6
7
8
9
10
[root@localhost awk]# awk '{print NR,FNR}' file file1
1 1
2 2
3 3
4 4
5 5
6 1
7 2
8 3
9 4
10 5
[root@localhost awk]#
[root@localhost awk]# awk 'NR==FNR{a[NR]=$1}NR!=FNR{print a[FNR],$2}' file file1
1 9
3 7
5 5
7 3
9 1
[root@localhost awk]#
