ubuntu20.04版本ROS下载问题

Question

下载：sudo apt install python3-roslaunch时被中断后就出现了这个问题

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debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable
(正在读取数据库 ... 系统当前共安装有 312621 个文件和目录。)
准备解压 .../0-gir1.2-gtk-3.0_3.24.20-0ubuntu1.1_amd64.deb ...
正在解压 gir1.2-gtk-3.0:amd64 (3.24.20-0ubuntu1.1) 并覆盖 (3.24.18-1ubuntu1) ...
准备解压 .../1-gir1.2-webkit2-4.0_2.38.5-0ubuntu0.20.04.1_amd64.deb ...
正在解压 gir1.2-webkit2-4.0:amd64 (2.38.5-0ubuntu0.20.04.1) 并覆盖 (2.32.3-0ubuntu0.20.04.1) ...
准备解压 .../2-gir1.2-javascriptcoregtk-4.0_2.38.5-0ubuntu0.20.04.1_amd64.deb ...
正在解压 gir1.2-javascriptcoregtk-4.0:amd64 (2.38.5-0ubuntu0.20.04.1) 并覆盖 (2.32.3-0ubuntu0.20.04.1) ...
准备解压 .../3-libtiff-dev_4.1.0+git191117-2ubuntu0.20.04.8_amd64.deb ...
正在解压 libtiff-dev:amd64 (4.1.0+git191117-2ubuntu0.20.04.8) 并覆盖 (4.1.0+git191117-2ubuntu0.20.04.7) ...
准备解压 .../4-libtiff5_4.1.0+git191117-2ubuntu0.20.04.8_amd64.deb ...
正在解压 libtiff5:amd64 (4.1.0+git191117-2ubuntu0.20.04.8) 并覆盖 (4.1.0+git191117-2ubuntu0.20.04.7) ...
准备解压 .../5-libtiffxx5_4.1.0+git191117-2ubuntu0.20.04.8_amd64.deb ...
正在解压 libtiffxx5:amd64 (4.1.0+git191117-2ubuntu0.20.04.8) 并覆盖 (4.1.0+git191117-2ubuntu0.20.04.7) ...
正在设置 python3-genmsg (0.5.14-1) ...
正在设置 gir1.2-gtk-3.0:amd64 (3.24.20-0ubuntu1.1) ...
正在设置 libb64-0d:amd64 (1.2-5) ...
正在设置 gir1.2-javascriptcoregtk-4.0:amd64 (2.38.5-0ubuntu0.20.04.1) ...
正在设置 linux-image-5.15.0-67-generic (5.15.0-67.74~20.04.1) ...
正在设置 shim-signed (1.40.9+15.7-0ubuntu1) ...
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub'
Sourcing file `/etc/default/grub'

Answer 1

这个配置
sudo gedit /etc/default/grub
里面的内容：GRUB_DEFAULT改为0

GRUB_DEFAULT=0
# sudo update-gru


```b 
再更新一下就可以了
sudo update-grub