Linux System Management

[Enable the root user in Ubuntu
Set the root password: sudo passwd Root
Ubuntu7.04 enable the root user: Set allowroot = true (true if enabled, otherwise false) in VIM/etc/X11/mcm/TPD. conf)
Ubuntu8.04 enable the root user: Set allowroot = true (enable to true, otherwise false) in VIM/etc/mcm/TPD. conf)

Cancel binding Mac to ethx
Unbind mac from ethx in Ubuntu 7.04
Vim/etc/iftab: comment out the corresponding MAC and ethx.
Unbind mac from ethx in Ubuntu 8.04
Rm/etc/udev/rules. d/*-persistent-net.rules

[Change UTC time to local time
In Vim/etc/default/RCs, Set UTC = No (the uct time is yes, and the local time is no)

[Set the root user language to Chinese in Ubuntu 8.04
Modify. profile in the root user directory:
Lang = "zh_CN.UTF-8"
Language = "zh_cn: ZH"

[Add an ISO software source in Ubuntu
Mount-T iso9660-o loop/Media/soft/downloads/ubuntu-8.04-dvd-i386.iso/Media/CDROM
Apt-CDROM-m-D/CDROM add

[Delete old kernel in Ubuntu
List all installed kernels and select the packages to be uninstalled. The kernel files with the image are as follows:
Dpkg -- Get-selections | grep Linux
Use apt-get to uninstall the old kernel:
Apt-Get remove linux-image-2.6.15-23-386