rm -rf dosyaadı şeklinde denermisiniz
hem ana dizinde hem de dosya içerisinde denedim.
ftp> rm -rf backup
550 Can't remove directory: No such file or directory
ftp> cd /cackup
550 Can't change directory to /cackup: No such file or directory
ftp> cd backup
550 Can't change directory to backup: No such file or directory
ftp> cd /backup
250 OK. Current directory is /backup
ftp> pwd
257 "/backup" is your current location
ftp> rm -rf backup
550 Can't remove directory: No such file or directory
ftp>