你好研发目前在定位，此问题有结论后会在此贴回复。

请提供一下机型的完整配置清单。

UOS 桌面专业版1070
兆芯KX6640

联想昭阳N4620Z

已激活

你完整的设置命令是什么？

1. sudo ip tuntap add mode tun dev tun0
2. sudo ip addr add 10.0.0.1/24 dev tun0
   3.sudo ip link set tun0 up

执行完第二步 可以设置上IP，再执行第三步 IP就没了

以下是系统日志

2025-04-09 15:51:39 cjsc-PC dvc-core-exe[944]:  ls: 无法访问'/dev/sr*': 没有那个文件或目录
2025-04-09 15:51:40 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: check Url: "http://detect.uniontech.com" exitCode: 0
2025-04-09 15:51:40 cjsc-PC kernel: [ 4207.116271] [lskg pub.c:257 lsk_task_name][QThread:932][I]realname mm exe_file:(null)
2025-04-09 15:51:40 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: code: 2 portalUrl: ""
2025-04-09 15:51:40 cjsc-PC deepin-service-manager[878]:  QProcess: Destroyed while process ("curl") is still running.
2025-04-09 15:51:46 cjsc-PC kernel: [ 4207.116350] [lskg pub.c:257 lsk_task_name][QThread:932][I]realname mm exe_file:(null)
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.199788] audit: type=1101 audit(1744185106.038:72796): pid=8942 uid=1000 auid=1000 ses=2 msg='op=PAM:accounting grantors=pam_permit acct="cjsc" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/0 res=success'
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.200025] audit: type=1123 audit(1744185106.038:72797): pid=8942 uid=1000 auid=1000 ses=2 msg='cwd="/home/cjsc/Desktop" cmd=6970206C696E6B207365742074756E30207570 terminal=pts/0 res=success'
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.200222] audit: type=1110 audit(1744185106.038:72798): pid=8942 uid=0 auid=1000 ses=2 msg='op=PAM:setcred grantors=deepin_security_verify,pam_permit,pam_udcp_nm acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/0 res=success'
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.223423] audit: type=1105 audit(1744185106.062:72799): pid=8942 uid=0 auid=1000 ses=2 msg='op=PAM:session_open grantors=pam_permit,pam_deepin_session,pam_unix acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/0 res=success'
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.0716] device (tun0): state change: unmanaged -> unavailable (reason 'connection-assumed', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.229098] IPv6: ADDRCONF(NETDEV_UP): tun0: link is not ready
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.230513] audit: type=1106 audit(1744185106.070:72800): pid=8942 uid=0 auid=1000 ses=2 msg='op=PAM:session_close grantors=pam_permit,pam_deepin_session,pam_unix acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/0 res=success'
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.230570] audit: type=1104 audit(1744185106.070:72801): pid=8942 uid=0 auid=1000 ses=2 msg='op=PAM:setcred grantors=deepin_security_verify,pam_permit,pam_udcp_nm acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/0 res=success'
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.0963] device (tun0): state change: unavailable -> disconnected (reason 'connection-assumed', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.1002] device (tun0): Activation: starting connection 'tun0' (bdae2512-1be1-45f8-87bd-4c79053fc8aa)
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.1139] device (tun0): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.1184] device (tun0): state change: prepare -> config (reason 'none', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.1241] device (tun0): state change: config -> ip-config (reason 'none', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.1263] device (tun0): state change: ip-config -> ip-check (reason 'none', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC dbus-daemon[877]:  [system] Activating via systemd: service name='org.freedesktop.nm_dispatcher' unit='dbus-org.freedesktop.nm-dispatcher.service' requested by ':1.12' (uid=0 pid=887 comm="/usr/sbin/NetworkManager --no-daemon ")
2025-04-09 15:51:46 cjsc-PC dbus-daemon[877]:  [system] Successfully activated service 'org.freedesktop.nm_dispatcher'
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.399916] audit: type=1130 audit(1744185106.238:72802): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=NetworkManager-dispatcher comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.2504] device (tun0): state change: ip-check -> deactivating (reason 'user-requested', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.2544] audit: op="device-disconnect" interface="tun0" ifindex=10 pid=1084 uid=0 result="success"
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.411229] audit: type=1111 audit(1744185106.250:72803): pid=887 uid=0 auid=4294967295 ses=4294967295 msg='op=device-disconnect interface="tun0" ifindex=10 pid=1084 uid=0 result=success exe="/usr/sbin/NetworkManager" hostname=? addr=? terminal=? res=success'
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.2656] device (tun0): state change: deactivating -> disconnected (reason 'user-requested', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC kernel: [ 4212.423250] IPv6: ADDRCONF(NETDEV_UP): tun0: link is not ready
2025-04-09 15:51:46 cjsc-PC NetworkManager[887]:    [1744185106.2776] device (tun0): state change: disconnected -> unmanaged (reason 'connection-assumed', sys-iface-state: 'external')
2025-04-09 15:51:46 cjsc-PC uos-license-agent[880]:  "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC deepin-deepinid-client[11749]:  "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC dvc-gui-start.sh[3326]:  "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC com.deepin.deepinid.Client[3259]:  2025-04-09, 15:51:46.335 [Warning] [  ] "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC daemon/network[3695]:  manager_connection.go:241: connection not found /org/freedesktop/NetworkManager/Settings/15
2025-04-09 15:51:46 cjsc-PC daemon/network[3695]:  manager_connection.go:241: connection not found /org/freedesktop/NetworkManager/Settings/15
2025-04-09 15:51:46 cjsc-PC dvc-gui-start.sh[3326]:  "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC deepin-deepinid-client[11749]:  "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC com.deepin.deepinid.Client[3259]:  2025-04-09, 15:51:46.348 [Warning] [  ] "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC daemon/network[3695]:  manager_connection.go:220: connection not found /org/freedesktop/NetworkManager/Settings/15
2025-04-09 15:51:46 cjsc-PC uos-license-agent[880]:  "No such interface “org.freedesktop.DBus.Properties” on object at path /org/freedesktop/NetworkManager/ActiveConnection/10"
2025-04-09 15:51:46 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: check Url: "http://detect.uniontech.com" exitCode: 0
2025-04-09 15:51:46 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: code: 2 portalUrl: ""
2025-04-09 15:51:48 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: check Url: "http://detect.uniontech.com" exitCode: 0
2025-04-09 15:51:48 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: code: 2 portalUrl: ""
2025-04-09 15:51:48 cjsc-PC deepin-service-manager[878]:  QProcess: Destroyed while process ("curl") is still running.
2025-04-09 15:51:48 cjsc-PC kernel: [ 4214.619039] [lskg pub.c:257 lsk_task_name][QThread:932][I]realname mm exe_file:(null)
2025-04-09 15:51:49 cjsc-PC dde-desktop[3696]:  no kGnomeCopyKey target in mimedata formats!
2025-04-09 15:51:50 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: check Url: "http://detect.uniontech.com" exitCode: 0
2025-04-09 15:51:50 cjsc-PC deepin-service-manager[878]:  org.deepin.deepin-service-manager.system.network: code: 2 portalUrl: ""
2025-04-09 15:51:50 cjsc-PC deepin-service-manager[878]:  QProcess: Destroyed while process ("curl") is still running.
2025-04-09 15:51:50 cjsc-PC kernel: [ 4214.619109] [lskg pub.c:257 lsk_task_name][QThread:932][I]realname mm exe_file:(null)
2025-04-09 15:51:50 cjsc-PC kernel: [ 4216.610303] [lskg pub.c:257 lsk_task_name][QThread:932][I]realname mm exe_file:(null)

号的OK，确定原因后回复你。