Ubuntu卸载snap

最近由于复现实验新装了Ubuntu20.04，发现后台中snapd进程占用高。snap是Canonical公司推出的一款软件管理工具，在20.04以及之后版本Ubuntu中都有预装，但因其难用，资源占用高被广为诟病，特搜索整理资料将其卸载。

1.打开终端，输入snap list，查看已安装的软件

root@ubuntu2204:~# snap list
Name    Version        Rev    Tracking       Publisher   Notes
core20  20240416       2318   latest/stable  canonical✓  base
lxd     5.0.3-80aeff7  29351  5.0/stable/…   canonical✓  -
snapd   2.63           21759  latest/stable  canonical✓  snapd

2.停止snapd服务

root@ubuntu2204:~# systemctl disable snapd.service && systemctl disable snapd.socket && systemctl disable snapd.seeded.service

3.依次移除snap安装的软件

运行 sudo snap remove --purge lxd 等命令依次删除前面列表中的各个软件，需要注意的是在上述列表notes列表明是base的表示是其他软件的依赖项，需要放在最后面删除。比如上图中的core20等等

root@ubuntu2204:~# snap remove --purge core20
error: cannot remove "core20": snap "core20" is not removable: snap is being used by snap lxd. # 提示要先移除lxd

root@ubuntu2204:~# snap remove --purge lxd
lxd removed

root@ubuntu2204:~# snap remove --purge core20
core20 removed

root@ubuntu2204:~# snap remove --purge snapd
snapd removed

root@ubuntu2204:~# cat remove_snap_package.sh
#!/bin/bash
snap remove --purge lxd
sum=$(snap list | awk 'NR>=2{print $1}' | wc -l)
while [ $sum -ne 0 ];do
    for p in $(snap list | awk 'NR>=2{print $1}') ;do
        snap remove --purge $p
    done
    sum=$(snap list | awk 'NR>=2{print $1}' | wc -l)
done

# 执行脚本移除
root@ubuntu2204:~# bash remove_snap_package.sh
# 提示如下，表明已经删除干净：
No snaps are installed yet. Try 'snap install hello-world'.

出现“Waiting for conflicting change in progress…”报错提示处理：

root@ubuntu2204:~# snap remove --purge lxd
...
2025-10-20T03:35:59Z INFO Waiting for conflicting change in progress...
2025-10-20T03:36:04Z INFO Waiting for conflicting change in progress... # 如果出现这个提示，“ctrl+c”结束
Disconnect interfaces of snap "lxd"                                                                              |
error: change finished in status "Undone" with no error message

# "snap changes"查看snap变化
root@ubuntu2204:~# snap changes
ID   Status  Spawn               Ready               Summary
1    Done    2024-09-11          2024-10-20          Initialize system state
2    Done    2024-10-20          2024-10-20          Initialize device
3    Undone  today at 03:35 UTC  today at 03:36 UTC  Remove "lxd" snap
4    Doing   today at 03:35 UTC  -                   Auto-refresh snaps "core20", "snapd"

# "snap abort ID"结束操作中的变化
root@ubuntu2204:~# snap abort 4

出现“error: snap “core20” has “auto-refresh” change in progress”报错提示处理：

root@ubuntu2204:~# snap remove --purge core20
error: snap "core20" has "auto-refresh" change in progress  # 出现这个提示

# "snap changes"查看snap变化
root@ubuntu2204:~# snap changes
ID   Status  Spawn               Ready               Summary
1    Done    2024-09-11          2024-10-20          Initialize system state
2    Done    2024-10-20          2024-10-20          Initialize device
3    Undone  today at 04:34 UTC  today at 04:35 UTC  Remove "lxd" snap
4    Doing   today at 04:34 UTC  -                   Auto-refresh snaps "core20", "snapd"
5    Done    today at 04:35 UTC  today at 04:36 UTC  Remove "lxd" snap

# "snap abort ID"结束操作中的变化
root@ubuntu2204:~# snap abort 4

出现“error: daemon is restarting”报错提示处理：

root@ubuntu2204:~# snap changes
error: daemon is restarting # 出现这个提示

# 重启snapd服务
root@ubuntu2204:~# systemctl restart snapd

4.完全清除 snapd

root@ubuntu2204:~# apt -y autoremove --purge snapd
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following packages will be REMOVED:
  snapd* squashfs-tools* ubuntu-server-minimal*
0 upgraded, 0 newly installed, 3 to remove and 0 not upgraded.
After this operation, 104 MB disk space will be freed.
(Reading database ... 74666 files and directories currently installed.)
Removing ubuntu-server-minimal (1.481.3) ...
Removing snapd (2.63+22.04ubuntu0.1) ...
Warning: Stopping snapd.service, but it can still be activated by:
  snapd.socket
Removing squashfs-tools (1:4.5-3build1) ...
Processing triggers for dbus (1.12.20-2ubuntu4.1) ...
Processing triggers for man-db (2.10.2-1) ...
(Reading database ... 74561 files and directories currently installed.)
Purging configuration files for snapd (2.63+22.04ubuntu0.1) ...
rmdir: failed to remove '/etc/systemd/system/snapd.mounts.target.wants': No such file or directory
Discarding preserved snap namespaces
Final directory cleanup
Removing extra snap-confine apparmor rules
Removing snapd cache
Removing snapd state

5.删除缓存目录（如有）

root@ubuntu2204:~# rm -rf ~/snap && sudo rm -rf /snap && rm -rf /var/snap && rm -rf /var/lib/snapd && rm -rf /var/cache/snapd

6.防止apt update自动安装snap

即使使用以上命令移除了 Snap 软件包，但如果没有关闭 apt 触发器，sudo apt update命令会再一次将 Snap 安装回来。

要关闭它，需要在/etc/apt/preferences.d/目录下创建一个 apt 设置文件nosnap.pref来阻止 Snap 服务自动下载

运行命令vi /etc/apt/preferences.d/nosnap.pref，打开编辑器，输入以下内容并保存文件

root@ubuntu2004:~# cat > /etc/apt/preferences.d/no-snapd.pref << EOF
Package: snapd
Pin: release a=*
Pin-Priority: -10
EOF

文件保存后运行sudo apt update 即可。

root@ubuntu2204:~# apt update

7.一键ubuntu卸载snap脚本

Shell脚本源码地址：

Gitee：https://gitee.com/raymond9/shell
Github：https://github.com/raymond999999/shell

可以去上面的Gitee或Github代码仓库拉取脚本。

root@ubuntu2204:~# cat remove_snap.sh 
#!/bin/bash
#
#**********************************************************************************
#Author:        Raymond
#QQ:            88563128
#MP:            Raymond运维
#Date:          2025-10-19
#FileName:      remove_snap.sh
#URL:           https://wx.zsxq.com/group/15555885545422
#Description:   The remove snap script supports 
#               "Ubuntu Server 20.04, 22.04 and 24.04 LTS" operating systems.
#Copyright (C): 2025 All rights reserved
#**********************************************************************************
COLOR="echo -e \\033[01;31m"
END='\033[0m'
LOGIN_USER=`whoami`

os(){
    . /etc/os-release
    MAIN_NAME=`sed -rn '/^NAME=/s@.*="([[:alpha:]]+).*"$@\1@p' /etc/os-release`
    if [ ${MAIN_NAME} == "Kylin" ];then
        MAIN_VERSION_ID=`sed -rn '/^VERSION_ID=/s@.*="([[:alpha:]]+)(.*)"$@\2@p' /etc/os-release`
    else
        MAIN_VERSION_ID=`sed -rn '/^VERSION_ID=/s@.*="?([0-9]+)\.?.*"?@\1@p' /etc/os-release`
    fi
}

ubuntu_remove_snap(){
    dpkg -s snapd &> /dev/null || { ${COLOR}"snap已卸载！"${END};exit; }
    systemctl disable snapd.service && systemctl disable snapd.socket && systemctl disable snapd.seeded.service
    if [ ${MAIN_NAME} == "Ubuntu" ];then
        if [ ${MAIN_VERSION_ID} == 20 -o ${MAIN_VERSION_ID} == 22 ];then
            snap remove --purge lxd
            sum=$(snap list | awk 'NR>=2{print $1}' | wc -l)
            while [ $sum -ne 0 ];do
                for p in $(snap list | awk 'NR>=2{print $1}'); do
                    snap remove --purge $p
                done
                sum=$(snap list | awk 'NR>=2{print $1}' | wc -l)
            done
        fi
    fi
    apt -y autoremove --purge snapd
    rm -rf ~/snap && sudo rm -rf /snap && rm -rf /var/snap && rm -rf /var/lib/snapd && rm -rf /var/cache/snapd
    cat > /etc/apt/preferences.d/no-snapd.pref << EOF
Package: snapd
Pin: release a=*
Pin-Priority: -10
EOF
    apt update
    ${COLOR}"${PRETTY_NAME}操作系统，snap卸载完成！"${END}
}

main(){
    if [ ${LOGIN_USER} == "root" ];then
        ubuntu_remove_snap
    else
        ${COLOR}"当然登录用户是${LOGIN_USER}，请使用root用户登录或设置root用户登录后再执行此脚本！"${END}
    fi
}

os
if [ ${MAIN_NAME} == "Ubuntu" ];then
    if [ ${MAIN_VERSION_ID} == 20 -o ${MAIN_VERSION_ID} == 22 -o ${MAIN_VERSION_ID} == 24 ];then
        main
    fi
else
    ${COLOR}"此脚本不支持${PRETTY_NAME}操作系统！"${END}
fi