[root@server1 Red.Hat.Enterprise.Linux.AS.3.Update4]# ls cd1 cd2 cd3 cd4 [root@server1 Red.Hat.Enterprise.Linux.AS.3.Update4]# cd 1 -bash: cd: 1: No such file or directory [root@server1 Red.Hat.Enterprise.Linux.AS.3.Update4]# cd cd1/ [root@server1 cd1]# ls rhel-3-U4-i386-as-disc1.iso [root@server1 cd1]# md5sum rhel-3-U4-i386-as-disc1.iso 2ecb8a9991ae4186645f7190a0d18862 rhel-3-U4-i386-as-disc1.iso [root@server1 cd1]# cd .. [root@server1 Red.Hat.Enterprise.Linux.AS.3.Update4]# cd cd 2 -bash: cd: cd: No such file or directory [root@server1 Red.Hat.Enterprise.Linux.AS.3.Update4]# cd cd2 [root@server1 cd2]# md5sum rhel-3-U4-i386-as-disc2.iso b6a68c61d32a63bfbd8dcf2f7c15a021 rhel-3-U4-i386-as-disc2.iso [root@server1 cd2]# cd .. [root@server1 Red.Hat.Enterprise.Linux.AS.3.Update4]# cd cd3 [root@server1 cd3]# md5sum rhel-3-U4-i386-as-disc3.iso b54d6d93f321a9ab76ab3c9fdef33705 rhel-3-U4-i386-as-disc3.iso [root@server1 cd3]# cd ../cd4 [root@server1 cd4]# ls rhel-3-U4-i386-as-disc4.iso [root@server1 cd4]# md5sum rhel-3-U4-i386-as-disc4.iso c4b0cc1210d78f942f87a6bd6e501ac1 rhel-3-U4-i386-as-disc4.iso [root@server1 cd4]#