[beyes@localhost basic_test]$ nl pass.txt
1 yes:no:hi:hello:maybe:welcome
2 ok:awk:bird:amd:tmd:intel:ati
3 name:linux:unix:gnu:bsd:open
4 suse:ubuntu:fedora:redhat:now
5 china:usa:korea:japan:enland:old
[beyes@localhost ~]$ nl -b a pass.txt
1 yes:no:hi:hello:maybe:welcome
2
3 ok:awk:bird:amd:tmd:intel:ati
4
5 name:linux:unix:gnu:bsd:open
6 suse:ubuntu:fedora:redhat:now
7 china:usa:korea:japan:enland:old
[beyes@localhost ~]$ nl -b t pass.txt
1 yes:no:hi:hello:maybe:welcome
2 ok:awk:bird:amd:tmd:intel:ati
3 name:linux:unix:gnu:bsd:open
4 suse:ubuntu:fedora:redhat:now
5 china:usa:korea:japan:enland:old
[beyes@localhost ~]$ nl -n ln pass.txt
1 yes:no:hi:hello:maybe:welcome
2 ok:awk:bird:amd:tmd:intel:ati
3 name:linux:unix:gnu:bsd:open
4 suse:ubuntu:fedora:redhat:now
5 china:usa:korea:japan:enland:old
[beyes@localhost ~]$ nl -n rn pass.txt
1 yes:no:hi:hello:maybe:welcome
2 ok:awk:bird:amd:tmd:intel:ati
3 name:linux:unix:gnu:bsd:open
4 suse:ubuntu:fedora:redhat:now
5 china:usa:korea:japan:enland:old
[beyes@localhost ~]$ nl -n rz pass.txt
000001 yes:no:hi:hello:maybe:welcome
000002 ok:awk:bird:amd:tmd:intel:ati
000003 name:linux:unix:gnu:bsd:open
000004 suse:ubuntu:fedora:redhat:now
000005 china:usa:korea:japan:enland:old
[beyes@localhost ~]$ nl -w 8 pass.txt
1 yes:no:hi:hello:maybe:welcome
2 ok:awk:bird:amd:tmd:intel:ati
3 name:linux:unix:gnu:bsd:open
4 suse:ubuntu:fedora:redhat:now
5 china:usa:korea:japan:enland:old
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