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              Linux常用命令之掛載、磁盤空間、用戶和群組

              掛載一個文件系統

              mount /dev/hda2 /mnt/hda2 掛載一個叫做hda2的盤 – 肯定目錄 ‘/ mnt/hda2’ 曾經存在

              umount /dev/hda2 卸載一個叫做hda2的盤 – 先從掛載點 ‘/ mnt/hda2’ 退出

              fuser -km /mnt/hda2 當設備繁忙時強制卸載

              umount -n /mnt/hda2 運行卸載操作而不寫入 /etc/mtab 文件- 當文件為只讀或當磁盤寫滿時非常有用

              mount /dev/fd0 /mnt/floppy 掛載一個軟盤

              mount /dev/cdrom /mnt/cdrom 掛載一個cdrom或dvdrom

              mount /dev/hdc /mnt/cdrecorder 掛載一個cdrw或dvdrom

              mount /dev/hdb /mnt/cdrecorder 掛載一個cdrw或dvdrom

              mount -o loop file.iso /mnt/cdrom 掛載一個文件或ISO鏡像文件

              mount -t vfat /dev/hda5 /mnt/hda5 掛載一個Windows FAT32文件系統

              mount /dev/sda1 /mnt/usbdisk 掛載一個usb 捷盤或閃存設備

              mount -t smbfs -o username=user,password=pass //WinClient/share /mnt/share 掛載一個windows網絡共享

              磁盤空間

              df -h 顯示已經掛載的分區列表

              ls -lSr |more 以尺寸大小排列文件和目錄

              du -sh dir1 估算目錄 ‘dir1′ 已經使用的磁盤空間’

              du -sk * | sort -rn 以容量大小為依據依次顯示文件和目錄的大小

              rpm -q -a –qf ‘%10{SIZE}t%{NAME}n’ | sort -k1,1n 以大小為依據依次顯示已安裝的rpm包所使用的空間 (fedora, redhat類系統)

              dpkg-query -W -f=’${Installed-Size;10}t${Package}n’ | sort -k1,1n 以大小為依據顯示已安裝的deb包所使用的空間 (ubuntu, debian類系統)

              用戶和群組

              groupadd group_name 創建一個新用戶組

              groupdel group_name 刪除一個用戶組

              groupmod -n new_group_name old_group_name 重命名一個用戶組

              useradd -c “Name Surname ” -g admin -d /home/user1 -s /bin/bash user1 創建一個屬于 “admin” 用戶組的用戶

              useradd user1 創建一個新用戶

              userdel -r user1 刪除一個用戶 ( ‘-r’ 排除主目錄)

              usermod -c “User FTP” -g system -d /ftp/user1 -s /bin/nologin user1 修改用戶屬性

              passwd 修改口令

              passwd user1 修改一個用戶的口令 (只允許root執行)

              chage -E 2005-12-31 user1 設置用戶口令的失效期限

              pwck 檢查 ‘/etc/passwd’ 的文件格式和語法修正以及存在的用戶

              grpck 檢查 ‘/etc/passwd’ 的文件格式和語法修正以及存在的群組

              newgrp group_name 登陸進一個新的群組以改動新創立文件的預設群組

               

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