如何在CentOS 7中安裝Snapd

本文介紹如何在CentOS 7作業系統中安裝Snapd的方法，文末附上執行snap --help命令返回的內容。

具體方法

1、首先安裝COPR外掛和EPEL，通過新增epel儲存庫並安裝copr yum外掛來啟動安裝，執行如下命令：

sudo yum install epel-release

sudo yum install yum-plugin-copr

2、然後新增repo：

$ sudo yum copr enable ngompa/snapcore-el7

Loaded plugins: copr, fastestmirror

You are about to enable a Copr repository. Please note that this repository is not part of the main Fedora distribution, and quality may vary.

The Fedora Project does not exercise any power over the contents of this repository beyond the rules outlined in the Copr FAQ at

<https://fedorahosted.org/copr/wiki/UserDocs#WhatIcanbuildinCopr>, and packages are not held to any quality or securty level.

Please do not file bug reports about these packages in Fedora Bugzilla. In case of problems, contact the owner of this repository.

Do you want to continue? [y/N]: y

copr done

3、新增儲存庫後，安裝snapd軟體包，執行以下命令：

sudo yum -y install snapd

4、等待安裝完成後啟用snapd socket：

$ sudo systemctl enable --now snapd.socket

Created symlink from /etc/systemd/system/sockets.target.wants/snapd.socket to /usr/lib/systemd/system/snapd.socket.

5、限制需要從/snap到/var/lib/snapd/snap下的/snap或符號連結下的snaps，為它建立一個符號連結，如下命令：

sudo ln -s /var/lib/snapd/snap /snap

做到這裡，Snapd已經安裝完成了。

附：snap用法及引數（英文）

# snap --help

用法:snap [OPTIONS] <command>

Install, configure, refresh and remove snap packages. Snaps are 'universal' packages that work across many different Linux systems,enabling secure distribution of the latest apps and utilities for cloud, servers, desktops and the internet of things.

This is the CLI for snapd, a background service that takes care of snaps on the system. Start with 'snap list' to see installed snaps.

應用選項:

--version——列印版本並退出

幫助選項:

-h, --help——顯示此幫助訊息

可用的命令:

abort——中止待定更改

ack——Adds an assertion to the system

alias——Sets up a manual alias

aliases——Lists aliases in the system

buy——Buys a snap

changes——List system changes

connect——Connects a plug to a slot

disable——Disables a snap in the system

disconnect——Disconnects a plug from a slot

download——Downloads the given snap

enable——Enables a snap in the system

find——Finds packages to install (aliases: search)

get——Prints configuration options

help——幫助

info——show detailed information about a snap

install——Installs a snap to the system

interface——Lists snap interfaces

interfaces——Lists interfaces in the system

known——Shows known assertions of the provided type

list——List installed snaps

login——Authenticates on snapd and the store

logout——Log out of the store

logs——Retrieve logs of services

pack——pack the given target dir as a snap

prefer——Prefer aliases from a snap and disable conflicts

refresh——Refreshes a snap in the system

remove——Removes a snap from the system

restart——Restart services

revert——Reverts the given snap to the previous state

run——Run the given snap command

services——Query the status of services

set——Changes configuration options

start——Start services

stop——Stop services

switch——Switches snap to a different channel

tasks——List a change's tasks (aliases: change)

try——Tests a snap in the system

unalias——Unalias a manual alias or an entire snap

version ——Shows version details

watch——Watch a change in progress

whoami——Prints the email the user is logged in with.