Ubuntu 26禁用自动升级
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沈沉舟
沈沉舟
青衣十三楼飞花堂
2026年6月18日 00:00
北京
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☆ Ubuntu 26禁用自动升级
vi defer_snap_update_1.sh
#!/bin/bash
systemctl stop snapd
jq -c \".data[\\\"last-refresh\\\"] = \\\"$(date +%Y-%m-%dT%H:%M:%S.%N%:z)\\\"\" /var/lib/snapd/state.json > /tmp/state.json
mv /tmp/state.json /var/lib/snapd/state.json
chmod 600 /var/lib/snapd/state.json
systemctl start snapd
snap set system refresh.timer=fri5,14:00-14:05
snap set system refresh.hold=\"$(date --iso-8601=seconds -d 'today+100 days')\"
snap set system refresh.metered=hold
snap set system refresh.retain=2
snap set core experimental.refresh-app-awareness=true
snap refresh --time
以root身份定期执行defer\_snap\_update\_1.sh，间隔不要大于3个月，以此阻止snap升级。
Ubuntu 26缺省没有\"Software & Updates\"，据说可以装回来
apt install software-properties-gtk
但我不想装回来。下面是一种过度防御方案，确保阻止apt自动升级，同时不影响手动升级。
systemctl mask --now unattended-upgrades
systemctl status unattended-upgrades
\"mask --now\"已含stop、disable的效果
# systemctl list-timers | grep apt
apt-daily.timer apt-daily.service
apt-daily-upgrade.timer apt-daily-upgrade.service
虽然有四项，但它们是两组，timer是触发器，service是真正干活的。
systemctl mask --now apt-daily.timer
systemctl mask --now apt-daily.service
systemctl mask --now apt-daily-upgrade.timer
systemctl mask --now apt-daily-upgrade.service
systemctl status apt-daily.timer
systemctl status apt-daily.service
systemctl status apt-daily-upgrade.timer
systemctl status apt-daily-upgrade.service
vi /etc/apt/apt.conf.d/20auto-upgrades
APT::Periodic::Update-Package-Lists \"0\";
APT::Periodic::Download-Upgradeable-Packages \"0\";
APT::Periodic::Unattended-Upgrade \"0\";
apt-config dump | grep -i periodic
再加一道保险
Settings
Network
Wired
Details
Metered connection: has data limits or can incur charges
On (Software updates and other large downloads will not be started automatically)
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