After updating -
when i use following command:
"sudo apt-get install build-essential autoconf automake libxmu-dev"
then execution of command as follows -
"The following packages will be upgraded:
cpp-4.3 gcc-4.3 gcc-4.3-base libgcc1 libgomp1 libstdc++6 libx11-6
7 upgraded, 29 newly installed, 0 to remove and 260 not upgraded.
Need to get 17.4MB/17.5MB of archives.
After this operation, 34.3MB of additional disk space will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
x11proto-core-dev libice-dev libsm-dev libx11-6 libxau-dev libxdmcp-dev
x11proto-xext-dev libxext-dev libxi-dev x11proto-input-dev x11proto-kb-dev
xtrans-dev libpthread-stubs0 libpthread-stubs0-dev libxcb1-dev
libxcb-xlib0-dev libx11-dev libxmu-headers libxt-dev gcc-4.3-base libstdc++6
libgomp1 cpp-4.3 gcc-4.3 libgcc1 m4 autoconf autotools-dev automake
libstdc++6-4.3-dev g++-4.3 dpkg-dev libxmu-dev"
then one time it ask
"Install these packages without verification [y/N]?"
when i answered "n"
then
"E: Some packages could not be authenticated"
and when i answered "y"
then
Media change: please insert the disc labeled
'Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081029.5)'
in the drive '/cdrom/' and press enter
Get:1
http://us.archive.ubuntu.com intrepid-updates/main x11proto-core-dev 7.0.12-1ubuntu0.1 [90.3kB]
Get:2
http://us.archive.ubuntu.com intrepid/main libice-dev 2:1.0.4-1 [56.0kB]
Get:3
http://us.archive.ubuntu.com intrepid/main libsm-dev 2:1.0.3-2 [24.9kB]
Get:4
http://us.archive.ubuntu.com intrepid-updates/main libx11-6 2:1.1.5-2ubuntu1.1 [622kB]
Get:5
http://us.archive.ubuntu.com intrepid/main libxau-dev 1:1.0.3-3 [15.6kB]
Get:6
http://us.archive.ubuntu.com intrepid/main libxdmcp-dev 1:1.0.2-3 [20.0kB]
Get:7
http://us.archive.ubuntu.com intrepid/main x11proto-xext-dev 7.0.2-6build1 [42.5kB]
Get:8
http://us.archive.ubuntu.com intrepid/main libxext-dev 2:1.0.4-1 [84.2kB]
Get:9
http://us.archive.ubuntu.com intrepid/main libxi-dev 2:1.1.3-2build1 [78.7kB]
Media change: please insert the disc labeled
'Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081029.5)'
in the drive '/cdrom/' and press enter
these msges i got? ? now please tell me what should i do??