主页 / ubuntu / 问题 / 1232004
Accepted
x70766c
Asked: 2020-04-28 07:45:47 +0800 CST

在 Ubuntu 20.04 上挂载 /tmp 作为 tmpfs

  • 772

我想在/tmp没有 fstab 条目的情况下使用tmp.mount

但是在 Ubuntu 20.04 LTS 上，它似乎不起作用。

user@user-x1:~$ systemctl status tmp.mount 
Unit tmp.mount could not be found.
user@user-x1:~$ sudo systemctl enable tmp.mount 
Failed to enable unit: Unit file tmp.mount does not exist.
user@user-x1:~$ sudo systemctl cat tmp.mount 
No files found for tmp.mount.
user@user-x1:~$ cat /usr/share/systemd/tmp.mount 
#  SPDX-License-Identifier: LGPL-2.1+
#
#  This file is part of systemd.
#
#  systemd is free software; you can redistribute it and/or modify it
#  under the terms of the GNU Lesser General Public License as published by
#  the Free Software Foundation; either version 2.1 of the License, or
#  (at your option) any later version.

[Unit]
Description=Temporary Directory (/tmp)
Documentation=https://systemd.io/TEMPORARY_DIRECTORIES
Documentation=man:file-hierarchy(7)
Documentation=https://www.freedesktop.org/wiki/Software/systemd/APIFileSystems
ConditionPathIsSymbolicLink=!/tmp
DefaultDependencies=no
Conflicts=umount.target
Before=local-fs.target umount.target
After=swap.target

[Mount]
What=tmpfs
Where=/tmp
Type=tmpfs
Options=mode=1777,strictatime,nosuid,nodev

[Install]
WantedBy=local-fs.target
user@user-x1:~$

发生了什么？为什么即使 bash 自动制表符填满，systemd 仍说找不到单元，而无需任何配置tmp.mount即可启用此功能的最简单方法是什么？tmpfs

fstab mount systemd tmpfs

2 个回答

  1. Best Answer

    默认情况下不启用 tmp.mount。只需复制并启用它

    sudo cp -v /usr/share/systemd/tmp.mount /etc/systemd/system/ 
sudo systemctl enable tmp.mount
    • 12

  2. 请注意，systemctl enable接受单元文件的绝对路径。（参见systemctl 手册页）因此无需手动复制。

    我在 Ubuntu 22.04 上测试过：

    $ sudo systemctl enable /usr/share/systemd/tmp.mount
Created symlink /etc/systemd/system/local-fs.target.wants/tmp.mount → /usr/share/systemd/tmp.mount.
Created symlink /etc/systemd/system/tmp.mount → /usr/share/systemd/tmp.mount.
    • 2

相关问题