Today, I helped my friend to install Debian. It was done via two GUI remote desktop connections (i.e., slow), and therefore I would like to access the server via SSH. So I tried to install the SSH package:<\/p>\n
\r\nsudo apt-get install -y ssh\r\n<\/pre>\nand I received the following message:<\/p>\n
\r\nReading package lists... Done\r\nBuilding dependency tree... Done\r\nPackage ssh is not available, but is referred to by another package.\r\nThis may mean that the package is missing, has been obsoleted, or\r\nis only available from another source\r\n<\/pre>\nActually this is a very easy problem. Debian tries to download SSH from the package source (defined in \/etc\/apt\/source.list) but the package (SSH) is not available. To solve this problem, we can simply edit the source list:<\/p>\n
\r\nsudo nano \/etc\/apt\/source.list\r\n<\/pre>\nand insert (if not exists) or update (if exists) the following links into your file:<\/p>\n
\r\ndeb http:\/\/ftp.us.debian.org\/debian\/ lenny main contrib non-free\r\ndeb http:\/\/security.debian.org\/ lenny\/updates main contrib non-free\r\n<\/pre>\nSince we’ve update the package source list, we need to update the package database of the system:<\/p>\n
\r\nsudo apt-get -y update\r\n<\/pre>\nNow we can install the package again:<\/p>\n
\r\nsudo apt-get install -y ssh\r\n<\/pre>\nand upgrade the entire system (optional):<\/p>\n
\r\nsudo apt-get -y dist-upgrade\r\n<\/pre>\nHave fun with Debian.<\/p>\n
–Derrick<\/p>\n
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