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Faheem Mitha's questions

Martin Hope
Faheem Mitha
Asked: 2022-02-10 02:21:01 +0800 CST
  • 1

我正在尝试在 Debian 中创建一个没有主目录的系统用户，以用于getmail.

即使我这样做了：

adduser --system --group --no-create-home getmail

进入的/etc/passwd是：

getmail:x:122:156::/home/getmail:/usr/sbin/nologin

即使该/home/getmail目录从未创建。为什么要提到一个从未创建过的目录？我期待在那里看到占位符/nonexistent，它出现在/etc/passwd.

为什么要/home/getmail输入条目，如果我想要/nonexistent条目，是否必须明确说明？

useradd
Martin Hope
Faheem Mitha
Asked: 2019-11-07 13:30:54 +0800 CST
  • 1

我正在尝试安装外部 USB 硬盘驱动器。具体来说，一个 USB 密钥。但udev不显示驱动器上的分区。

我正在运行带有库存内核的 D​​ebian 10（buster），即4.19.0-6-amd64.

fdisk报告

root@orwell:/mnt# fdisk -l /dev/sdh
Disk /dev/sdh: 1.9 GiB, 2001076224 bytes, 3908352 sectors
Disk model: Cruzer Blade
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x03b1e8fa

Device     Boot Start     End Sectors  Size Id Type
/dev/sdh1        2048 3908351 3906304  1.9G  b W95 FAT32

但是如果我尝试挂载分区，我会得到

root@orwell:/mnt# mount -t vfat /dev/sdh1 joseph
mount: /mnt/joseph: special device /dev/sdh1 does not exist.

虽然这可能不是很相关，但分区似乎也没有 UUID。至少，该设备没有出现在blkid.

journalctl在插入设备时显示以下日志。

Nov 06 19:01:09 orwell kernel: usb 1-1: new high-speed USB device number 6 using ehci-pci
Nov 06 19:01:09 orwell kernel: usb 1-1: New USB device found, idVendor=0781, idProduct=5567, bcdDevice= 1.00
Nov 06 19:01:09 orwell kernel: usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
Nov 06 19:01:09 orwell kernel: usb 1-1: Product: Cruzer Blade
Nov 06 19:01:09 orwell kernel: usb 1-1: Manufacturer: SanDisk
Nov 06 19:01:09 orwell kernel: usb 1-1: SerialNumber: 20063486020EF1B285D3
Nov 06 19:01:09 orwell kernel: usb-storage 1-1:1.0: USB Mass Storage device detected
Nov 06 19:01:09 orwell kernel: scsi host11: usb-storage 1-1:1.0
Nov 06 19:01:09 orwell mtp-probe[30090]: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:12.2/usb1/1-1"
Nov 06 19:01:09 orwell mtp-probe[30090]: bus: 1, device: 6 was not an MTP device
Nov 06 19:01:10 orwell mtp-probe[30094]: checking bus 1, device 6: "/sys/devices/pci0000:00/0000:00:12.2/usb1/1-1"
Nov 06 19:01:10 orwell mtp-probe[30094]: bus: 1, device: 6 was not an MTP device
Nov 06 19:01:10 orwell kernel: scsi 11:0:0:0: Direct-Access     SanDisk  Cruzer Blade     1.01 PQ: 0 ANSI: 2
Nov 06 19:01:10 orwell kernel: sd 11:0:0:0: Attached scsi generic sg9 type 0
Nov 06 19:01:10 orwell kernel: sd 11:0:0:0: [sdh] 3908352 512-byte logical blocks: (2.00 GB/1.86 GiB)
Nov 06 19:01:10 orwell kernel: sd 11:0:0:0: [sdh] Write Protect is off
Nov 06 19:01:10 orwell kernel: sd 11:0:0:0: [sdh] Mode Sense: 03 00 00 00
Nov 06 19:01:10 orwell kernel: sd 11:0:0:0: [sdh] No Caching mode page found
Nov 06 19:01:10 orwell kernel: sd 11:0:0:0: [sdh] Assuming drive cache: write through
Nov 06 19:01:11 orwell kernel: sd 11:0:0:0: [sdh] Attached SCSI removable disk
Nov 06 19:01:11 orwell systemd[1]: Starting [email protected]...
Nov 06 19:01:11 orwell usbmount[30113]: loaded usbmount configurations
Nov 06 19:01:11 orwell usbmount[30114]: usbmount is disabled, see /etc/usbmount/usbmount.conf
Nov 06 19:01:11 orwell systemd[1]: Started [email protected].
Nov 06 19:01:11 orwell audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj==unconfined msg='unit=usbmount@dev-sdh comm="systemd" exe="/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
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