如何备份debian中所安装的软件包列表？
alfie@ds-server:$ dpkg -–get-selections | grep -v deinstall > debian-files
alfie@ds-server:$ cat debian-files | mailx -s “debian-files” my.mail@my.address
alfie@ds-server:$ cat debian-files | mailx -s “debian-files” my.mail@my.address
注意：
- exim服务要开启；
- 如果有手工安装的deb包，那重装的时候可能会出错；
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