dpkg: --purge needs at least one package name argument Type dpkg --help for help about installing and deinstalling packages [*]; Use `dselect' or `aptitude' for user-friendly package management; Type dpkg -Dhelp for a list of dpkg debug flag values; Type dpkg --force-help for a list of forcing options; Type dpkg-deb --help for help about manipulating *.deb files; Type dpkg --license for copyright license and lack of warranty (GNU GPL) [*]. Options marked [*] produce a lot of output - pipe it through `less' or `more' !
ls -d */. 或 echo */.
lftp -c "open Remote_IP;user UserName Password;set cache:enable false;set ftp:passive-mode false;set net:timeout 15;mirror -e -c /back /backup;"