升级FreeBSD系统FreeBSD8.1升级成FreeBSD8.2的操作过程
kiccleaf# uname -a FreeBSD qm.w 8.1-RELEASE FreeBSD 8.1-RELEASE #0: Fri Feb 18 02:24:46 UTC 2011 root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386 kiccleaf# freebsd-update -r 8.2-RELEASE upgrade Looking up update.FreeBSD.org mirrors... 4 mirrors found. Fetching metadata signature for 8.1-RELEASE from update5.FreeBSD.org... done. Fetching metadata index... done. Fetching 1 metadata patches. done. Applying metadata patches... done. Fetching 1 metadata files... done. Inspecting system... done. The following components of FreeBSD seem to be installed: kernel/generic world/base The following components of FreeBSD do not seem to be installed: src/base src/bin src/cddl src/contrib src/crypto src/etc src/games src/gnu src/include src/krb5 src/lib src/libexec src/release src/rescue src/sbin src/secure src/share src/sys src/tools src/ubin src/usbin world/catpages world/dict world/doc world/games world/info world/manpages world/proflibs Does this look reasonable (y/n)? y Fetching metadata signature for 8.2-RELEASE from update5.FreeBSD.org... done. Fetching metadata index... done. Fetching 1 metadata patches. done. Applying metadata patches... done. Fetching 1 metadata files... done. Inspecting system... done. Fetching files from 8.1-RELEASE for merging... done. Preparing to download files... done. Fetching 5591 60....5570....5580....5590 done. Applying patches... done. Fetching 47 files... done. Attempting to automatically merge changes in files... done. kiccleaf# freebsd-update install Installing updates... Kernel updates have been installed. Please reboot and run "/usr/sbin/freebsd-update install" again to finish installing updates.
记住以下这两步不可少，否则远程登陆不了就要跑机房咯
第一步：先更新一下ssh
kiccleaf# vi /etc/ssh/sshd_config Port 22 PermitRootLogin no PubkeyAuthentication yes AuthorizedKeysFile .ssh/id_dsa.pub PasswordAuthentication no PermitEmptyPasswords no
第二步：把配置ssh随系统启动
kiccleaf# cat /etc/rc.conf sshd_enable="YES" kiccleaf# shutdown -r now kiccleaf# uname -a FreeBSD qm.w 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Fri Feb 18 02:24:46 UTC 2011 root@almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386