For example add into /etc/apt/sources.lists following lines:

# some coment
deb http://www.cecak.cz/debian/lenny ./
[ICO]NameLast modifiedSizeDescription

[DIR]Parent Directory  -
[TXT]HEADER.html09-Dec-2010 20:37 151
[   ]Override18-Dec-2016 08:10 0
[   ]Packages18-Dec-2016 08:10 90K
[   ]Packages.gz18-Dec-2016 08:10 18K
[   ]bash-builtins_3.2-4.2_amd64.deb06-Oct-2014 22:10 100K
[   ]bash-doc_3.2-4.2_all.deb06-Oct-2014 22:10 314K
[   ]bash-minimal_3.2-4.2_amd64.deb06-Oct-2014 22:10 229K
[   ]bash-static_3.2-4.2_amd64.deb06-Oct-2014 22:10 760K
[   ]bash_3.2-4.2_amd64.deb06-Oct-2014 22:13 627K
[DIR]build/18-Dec-2016 08:09 -
[   ]clamav-base_0.98+dfsg-1loc1_all.deb24-Oct-2016 11:07 310K
[   ]clamav-daemon_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 432K
[   ]clamav-dbg_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 1.5M
[   ]clamav-docs_0.98+dfsg-1loc1_all.deb24-Oct-2016 11:07 1.3M
[   ]clamav-freshclam_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 325K
[   ]clamav-milter_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 359K
[   ]clamav-testfiles_0.98+dfsg-1loc1_all.deb24-Oct-2016 11:07 5.0M
[   ]clamav_0.98+dfsg-1loc1.diff.gz24-Oct-2016 11:02 283K
[   ]clamav_0.98+dfsg-1loc1.dsc24-Oct-2016 11:02 1.3K
[   ]clamav_0.98+dfsg-1loc1_amd64.changes24-Oct-2016 11:07 4.5K
[   ]clamav_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 355K
[   ]finch-dev_2.5.5-1-loc1_all.deb09-Dec-2010 20:37 162K
[   ]finch_2.5.5-1-loc1_i386.deb09-Dec-2010 20:37 333K
[   ]firmware-linux-free_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:30 148K
[   ]kvm-dbg_84+dfsg-2loc1_amd64.deb31-Oct-2012 20:35 1.8M
[   ]kvm-source_72+dfsg-5~lenny3-loc3_all.deb09-Dec-2010 20:37 155K
[   ]kvm-source_84+dfsg-2loc1_all.deb31-Oct-2012 20:35 268K
[   ]kvm_72+dfsg-5~lenny3-loc3_amd64.deb09-Dec-2010 20:37 1.1M
[   ]kvm_84+dfsg-2loc1_amd64.deb31-Oct-2012 20:35 1.3M
[   ]libclamav-dev_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 226K
[   ]libclamav6_0.98+dfsg-1loc1_amd64.deb24-Oct-2016 11:07 4.0M
[   ]libpam-thinkfinger_0.3+r118-0ubuntu4loc1_i386.deb09-Dec-2010 20:37 17K
[   ]libpurple-bin_2.5.5-1-loc1_all.deb09-Dec-2010 20:37 137K
[   ]libpurple-dev_2.5.5-1-loc1_all.deb09-Dec-2010 20:37 282K
[   ]libpurple0_2.5.5-1-loc1_i386.deb09-Dec-2010 20:37 1.6M
[   ]libservlet2.5-java-doc_6.0.20-7loc1_all.deb09-Dec-2010 20:37 245K
[   ]libservlet2.5-java_6.0.20-7loc1_all.deb09-Dec-2010 20:37 179K
[   ]libthinkfinger-dev_0.3+r118-0ubuntu4loc1_i386.deb09-Dec-2010 20:37 18K
[   ]libthinkfinger-doc_0.3+r118-0ubuntu4loc1_all.deb09-Dec-2010 20:37 74K
[   ]libthinkfinger0_0.3+r118-0ubuntu4loc1_i386.deb09-Dec-2010 20:37 17K
[   ]libtomcat6-java_6.0.20-7loc1_all.deb09-Dec-2010 20:37 2.8M
[   ]linux-base_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:30 169K
[   ]linux-doc-2.6.32_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:24 5.7M
[   ]linux-headers-2.6.32-bpo.5-all-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:00 143K
[   ]linux-headers-2.6.32-bpo.5-all_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:00 143K
[   ]linux-headers-2.6.32-bpo.5-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 06:45 516K
[   ]linux-headers-2.6.32-bpo.5-common-openvz_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:00 3.8M
[   ]linux-headers-2.6.32-bpo.5-common-vserver_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:13 3.8M
[   ]linux-headers-2.6.32-bpo.5-common_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 06:45 3.7M
[   ]linux-headers-2.6.32-bpo.5-openvz-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:00 540K
[   ]linux-headers-2.6.32-bpo.5-vserver-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:12 519K
[   ]linux-image-2.6.32-bpo.5-amd64-dbg_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 06:45 360M
[   ]linux-image-2.6.32-bpo.5-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 06:36 28M
[   ]linux-image-2.6.32-bpo.5-openvz-amd64-dbg_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 06:59 426M
[   ]linux-image-2.6.32-bpo.5-openvz-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 06:52 28M
[   ]linux-image-2.6.32-bpo.5-vserver-amd64-dbg_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:12 370M
[   ]linux-image-2.6.32-bpo.5-vserver-amd64_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:06 28M
[   ]linux-libc-dev_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:00 825K
[   ]linux-manual-2.6.32_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:26 2.0M
[   ]linux-patch-debian-2.6.32_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:27 7.9M
[   ]linux-source-2.6.32_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:30 62M
[   ]linux-support-2.6.32-bpo.5_2.6.32-36~bpo50+1_all.deb18-Dec-2016 06:30 159K
[   ]linux-tools-2.6.32_2.6.32-36~bpo50+1_amd64.deb18-Dec-2016 07:01 316K
[   ]maven-repo-helper_0.9-loc1_all.deb09-Dec-2010 20:37 56K
[DIR]php4/09-Aug-2010 03:53 -
[   ]pidgin-data_2.5.5-1-loc1_all.deb09-Dec-2010 20:37 6.9M
[   ]pidgin-dbg_2.5.5-1-loc1_i386.deb09-Dec-2010 20:37 5.3M
[   ]pidgin-dev_2.5.5-1-loc1_all.deb09-Dec-2010 20:37 1.4M
[   ]pidgin_2.5.5-1-loc1_i386.deb09-Dec-2010 20:37 689K
[   ]thinkfinger-tools_0.3+r118-0ubuntu4loc1_i386.deb09-Dec-2010 20:37 16K
[   ]tomcat6-admin_6.0.20-7loc1_all.deb09-Dec-2010 20:37 38K
[   ]tomcat6-common_6.0.20-7loc1_all.deb09-Dec-2010 20:37 36K
[   ]tomcat6-docs_6.0.20-7loc1_all.deb09-Dec-2010 20:37 482K
[   ]tomcat6-examples_6.0.20-7loc1_all.deb09-Dec-2010 20:37 411K
[   ]tomcat6-user_6.0.20-7loc1_all.deb09-Dec-2010 20:37 21K
[   ]tomcat6_6.0.20-7loc1_all.deb09-Dec-2010 20:37 26K
[   ]ttf-symbol-replacement_1.2.2-0ubuntu1loc1_all.deb09-Dec-2010 20:37 57K
[   ]wine-dev_1.2.2-0ubuntu1loc1_all.deb09-Dec-2010 20:37 39K
[   ]wine-gecko_1.2.2-0ubuntu1loc1_all.deb09-Dec-2010 20:37 39K
[   ]wine1.2-dbg_1.2.2-0ubuntu1loc1_i386.deb09-Dec-2010 20:37 40K
[   ]wine1.2-dev_1.2.2-0ubuntu1loc1_i386.deb09-Dec-2010 20:37 2.1M
[   ]wine1.2-gecko_1.0.0-0ubuntu4loc1_i386.deb30-Mar-2011 23:06 7.7M
[   ]wine1.2_1.2.2-0ubuntu1loc1_i386.deb09-Dec-2010 20:53 16M
[   ]wine_1.2.2-0ubuntu1loc1_all.deb09-Dec-2010 20:53 39K

Apache/2.2.9 (Debian) Server at www.cecak.cz Port 80