這是個實用的指令，記錄一下囉！Linux 製作原始安裝光碟 ISO 檔很簡單，只要用 dd 就可以搞定了。
參考：nixCraft
因為來源是光碟機，所以要知道光碟機的裝置代碼，而我沒有安裝圖形介面，所以光碟是不會自動掛載的。
按照文章裡面的指令，執行 mount，但卻沒有自動掛載光碟機！嘿！
| # mount /dev/sda2 on / type ext3 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda5 on /backup type ext3 (rw) /dev/sda3 on /vm type ext3 (rw) /dev/sda1 on /boot type ext3 (rw) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) |
所以，便利用 dmesg 來找光碟機囉！
| # dmesg |grep cd ehci_hcd 0000:00:12.2: EHCI Host Controller ehci_hcd 0000:00:12.2: new USB bus registered, assigned bus number 1 ehci_hcd 0000:00:12.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaro und ehci_hcd 0000:00:12.2: debug port 1 ehci_hcd 0000:00:12.2: irq 193, io mem 0xfe02d000 ehci_hcd 0000:00:12.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 ehci_hcd 0000:00:13.2: EHCI Host Controller ehci_hcd 0000:00:13.2: new USB bus registered, assigned bus number 2 ehci_hcd 0000:00:13.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaro und ehci_hcd 0000:00:13.2: debug port 1 ehci_hcd 0000:00:13.2: irq 193, io mem 0xfe02b000 ehci_hcd 0000:00:13.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 ehci_hcd 0000:00:16.2: EHCI Host Controller ehci_hcd 0000:00:16.2: new USB bus registered, assigned bus number 3 ehci_hcd 0000:00:16.2: applying AMD SB700/SB800/Hudson-2/3 EHCI dummy qh workaro und ehci_hcd 0000:00:16.2: debug port 1 ehci_hcd 0000:00:16.2: irq 193, io mem 0xfe028000 ehci_hcd 0000:00:16.2: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 ohci_hcd: 2005 April 22 USB 1.1 'Open' Host Controller (OHCI) Driver (PCI) ohci_hcd 0000:00:12.0: OHCI Host Controller ohci_hcd 0000:00:12.0: new USB bus registered, assigned bus number 4 ohci_hcd 0000:00:12.0: irq 201, io mem 0xfe02e000 ohci_hcd 0000:00:13.0: OHCI Host Controller ohci_hcd 0000:00:13.0: new USB bus registered, assigned bus number 5 ohci_hcd 0000:00:13.0: irq 201, io mem 0xfe02c000 ohci_hcd 0000:00:14.5: OHCI Host Controller ohci_hcd 0000:00:14.5: new USB bus registered, assigned bus number 6 ohci_hcd 0000:00:14.5: irq 201, io mem 0xfe02a000 ohci_hcd 0000:00:16.0: OHCI Host Controller ohci_hcd 0000:00:16.0: new USB bus registered, assigned bus number 7 ohci_hcd 0000:00:16.0: irq 201, io mem 0xfe029000 usb 4-2: new low speed USB device using ohci_hcd and address 2 sr0: scsi3-mmc drive: 48x/48x writer dvd-ram cd/rw xa/form2 cdda tray |
哈！看到了光碟機所屬的裝置代碼，就掛載做一下測試囉！
| # mount /dev/sr0 /media/ mount: block device /dev/sr0 is write-protected, mounting read-only |
既然可以掛載，就可以將它卸載了。
| # umount /media/ |
接下來就是執行 dd 指令：
| # dd if=/dev/sr0 of=/backup/iso/CentOS-5.8-i386-bin-DVD.iso 7663296+0 records in 7663296+0 records out 3923607552 bytes (3.9 GB) copied, 263.504 seconds, 14.9 MB/s |
看一下成果：
| # ll /backup/iso/ total 3835400 -rw-r--r-- 1 root root 3923607552 Apr 1 18:51 CentOS-5.8-i386-bin-DVD.iso |
要掛載 ISO 檔也蠻簡單的，如下列指令：
| # mount -o loop /backup/iso/CentOS-5.8-i386-bin-DVD.iso /media/ |
基本的東西，也是要好好記錄囉！
20120401
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