root@ip-172-20-17-113:/# apt-get install curl
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  ca-certificates libcurl3 libidn11 libldap-2.4-2 librtmp1 libsasl2-2 libsasl2-modules libsasl2-modules-db libssh2-1 openssl
Suggested packages:
  libsasl2-modules-otp libsasl2-modules-ldap libsasl2-modules-sql libsasl2-modules-gssapi-mit libsasl2-modules-gssapi-heimdal
The following NEW packages will be installed:
  ca-certificates curl libcurl3 libidn11 libldap-2.4-2 librtmp1 libsasl2-2 libsasl2-modules libsasl2-modules-db libssh2-1 openssl
0 upgraded, 11 newly installed, 0 to remove and 0 not upgraded.
Need to get 0 B/2,148 kB of archives.
After this operation, 4,222 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
WARNING: The following packages cannot be authenticated!
  libidn11 libsasl2-modules-db libsasl2-2 libldap-2.4-2 librtmp1 libssh2-1 libcurl3 openssl ca-certificates curl libsasl2-modules
Install these packages without verification? [y/N]y
Err file:/media/mirror/ cskoeln/main libidn11 amd64 1.29-1+b2
  File not found
Err file:/media/mirror/ cskoeln/main libsasl2-modules-db amd64 2.1.26.dfsg1-13+deb8u1
  File not found
Err file:/media/mirror/ cskoeln/main libsasl2-2 amd64 2.1.26.dfsg1-13+deb8u1
  File not found
Err file:/media/mirror/ cskoeln/main libldap-2.4-2 amd64 2.4.40+dfsg-1+deb8u1
  File not found
Err file:/media/mirror/ cskoeln/main librtmp1 amd64 2.4+20150115.gita107cef-1
  File not found
Err file:/media/mirror/ cskoeln/main libssh2-1 amd64 1.4.3-4.1
  File not found
Err file:/media/mirror/ cskoeln/main libcurl3 amd64 7.38.0-4+deb8u2
  File not found
Err file:/media/mirror/ cskoeln/main openssl amd64 1.0.1k-3+deb8u1
  File not found
Err file:/media/mirror/ cskoeln/main ca-certificates all 20141019
  File not found
Err file:/media/mirror/ cskoeln/main curl amd64 7.38.0-4+deb8u2
  File not found
Err file:/media/mirror/ cskoeln/main libsasl2-modules amd64 2.1.26.dfsg1-13+deb8u1
  File not found
N: Ignoring file 'fai' in directory '/etc/apt/sources.list.d/' as it has no filename extension
N: Ignoring file 'fai' in directory '/etc/apt/sources.list.d/' as it has no filename extension
E: Failed to fetch file:/media/mirror/pool/main/libi/libidn/libidn11_1.29-1+b2_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/c/cyrus-sasl2/libsasl2-modules-db_2.1.26.dfsg1-13+deb8u1_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/c/cyrus-sasl2/libsasl2-2_2.1.26.dfsg1-13+deb8u1_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/o/openldap/libldap-2.4-2_2.4.40+dfsg-1+deb8u1_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/r/rtmpdump/librtmp1_2.4+20150115.gita107cef-1_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/libs/libssh2/libssh2-1_1.4.3-4.1_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/c/curl/libcurl3_7.38.0-4+deb8u2_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/o/openssl/openssl_1.0.1k-3+deb8u1_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/c/ca-certificates/ca-certificates_20141019_all.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/c/curl/curl_7.38.0-4+deb8u2_amd64.deb  File not found

E: Failed to fetch file:/media/mirror/pool/main/c/cyrus-sasl2/libsasl2-modules_2.1.26.dfsg1-13+deb8u1_amd64.deb  File not found

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
root@ip-172-20-17-113:/#