安装应用
我们以安装 kubectl 命令为例：
第一步、先进行应用的搜索
# snap search kubectl Name Version Publisher Notes Summary kubectl 1.18.8 canonical? classic Command line client for controlling a Kubernetes cluster. kubernetes-worker 0.0.1 canonical? - A complete Kubernetes worker kafkactl 1.11.0 dwi-di - A command-line interface for interaction with Apache Kafka kubectl-eks 1.10.3 canonical-cloud-snaps classic kubectl controls the Kubernetes cluster manager. kubectl-iexec v1.6.2-next leetserve - plugin to interactively exec to a pod client-keystone-auth v1.14.0+git36.e163280 knobby - Client plugin for kubectl to enable keystone authentication. devoperator 1.5.1 art-hens-teeth classic DevOps tools kube-commander 0.2.1 anatoly-rugalev - Browse your kubernetes clusters in a casual way
第二步、查看软件包信息，获取所有可用版本
# snap info kubectl name: kubectl summary: Command line client for controlling a Kubernetes cluster. publisher: Canonical? store-url: https://snapcraft.io/kubectl contact: https://www.ubuntu.com/kubernetes license: Apache-2.0 description: | kubectl is a command line client for running commands against Kubernetes clusters. For more information about kubectl, including syntax, descriptions of command operations, and common examples, see the [overview](https://kubernetes.io/docs/reference/kubectl/overview/). For details about each command, including all the supported flags and subcommands, see the [kubectl reference documentation](https://kubernetes.io/docs/reference/generated/kubectl/kubectl-commands/). snap-id: ZgG2URycDgvxSVskfoZxn44uaRMw0iwe channels: latest/stable: 1.18.8 2020-08-27 (1612) 10MB classic latest/candidate: 1.18.8 2020-08-27 (1612) 10MB classic latest/beta: 1.18.8 2020-08-27 (1612) 10MB classic latest/edge: 1.18.8 2020-08-27 (1612) 10MB classic 1.19/stable: 1.19.0 2020-08-27 (1623) 10MB classic 1.19/candidate: 1.19.0 2020-08-27 (1623) 10MB classic 1.19/beta: 1.19.0 2020-08-27 (1623) 10MB classic 1.19/edge: 1.19.0 2020-08-27 (1623) 10MB classic 1.18/stable: 1.18.8 2020-08-26 (1612) 10MB classic ...
第三步、安装应用（或特定版本）
# snap install kubectl --classic // 如果需要安装特定版本 # snap install kubectl --classic --channel=1.18/stable
注意事项，是否使用 --classic 选项与应用程序权限有关，应用的 Snapcraft 主页或者错误信息会提示是否需要使用 --classic 选项。
第四步、运行应用
假如我们安装 xmind 应用，那么运行方式为（不建议直接到 /snap 中运行应用）：
snap run xmind
桌面图标，保存在 /var/lib/snapd/desktop/applications/ 目录中
相关链接
相关文章
「snap」- error: snap "xxx" has "install-snap" change in progress
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「snap」- 配置使用网络加速服务
参考文献
How to install snap packages behind web proxy on Ubuntu 16.04 - Ask Ubuntu
How to list all available versions of a snap which is not installed? - Ask Ubuntu
ubuntu - Install specific previous version of package using snap? - Unix & Linux Stack Exchange