표준 입력된 내용의 각 행에서 시작열과 끝열을 삭제하고 출력하기

[root@su250 ~]# cat passwd | colrm 20 30

root:x:0:0:root:/roh

bin:x:1:1:bin:/bin:in

daemon:x:2:2:daemonn/nologin

adm:x:3:4:adm:/var/ologin

lp:x:4:7:lp:/var/spin/nologin

sync:x:5:0:sync:/sbc

shutdown:x:6:0:shut/sbin/shutdown

halt:x:7:0:halt:/sblt

mail:x:8:12:mail:/vil:/sbin/nologin

ftp:x:14:50:FTP Use/sbin/nologin

nobody:x:99:99:Nobonologin

vcsa:x:69:69:virtuaemory owner:/dev:/sbin/nologin

polkituser:x:87:87::/sbin/nologin

pulse:x:497:497:Pultem Daemon:/var/run/pulse:/sbin/nologin

rpc:x:32:32:Rpcbindr/lib/rpcbind:/sbin/nologin

distcache:x:94:94:D/sbin/nologin

nscd:x:28:28:NSCD Din/nologin

rpcuser:x:29:29:RPCer:/var/lib/nfs:/sbin/nologin

nfsnobody:x:65534:4s NFS User:/var/lib/nfs:/sbin/nologin

tcpdump:x:72:72::/:in

avahi:x:496:492:avavar/run/avahi-daemon:/sbin/nologin

apache:x:48:48:Apac:/sbin/nologin

smolt:x:495:491:Smore/smolt:/sbin/nologin

mailnull:x:47:47::/queue:/sbin/nologin

smmsp:x:51:51::/varue:/sbin/nologin

sshd:x:74:74:Priviled SSH:/var/empty/sshd:/sbin/nologin

webalizer:x:67:67:War/www/usage:/sbin/nologin

torrent:x:494:488:Beed/Tracker:/var/lib/bittorrent:/sbin/nologin

haldaemon:x:68:68:H:/sbin/nologin

squid:x:23:23::/vard:/sbin/nologin

gdm:x:42:42::/var/ln/nologin

bible:x:500:500:BIBble:/bin/bash

[root@su250 ~]#