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前一段时间有收到这样的一个关于linux用户的权限相关的需求#xff0c;在centos上给用户创建一个用SSH的密钥访问服务器#xff0c;另给该用户添加到root权限组。记录下了步骤#xff0c;分享给大家。
步骤#xff1a;
添加root用户组#xff1a;
gr…需求
前一段时间有收到这样的一个关于linux用户的权限相关的需求在centos上给用户创建一个用SSH的密钥访问服务器另给该用户添加到root权限组。记录下了步骤分享给大家。
步骤
添加root用户组
groupadd ams给用户组添加root权限且切换root不需要输入root密码权限高请注意
$ visudo
## 添加了这一行 %ams ALL(ALL) NOPASSWD: ALL## Sudoers allows particular users to run various commands as
## the root user, without needing the root password.
##
## Examples are provided at the bottom of the file for collections
## of related commands, which can then be delegated out to particular
## users or groups.
##
## This file must be edited with the visudo command.## Host Aliases
## Groups of machines. You may prefer to use hostnames (perhaps using
## wildcards for entire domains) or IP addresses instead.
# Host_Alias FILESERVERS fs1, fs2
# Host_Alias MAILSERVERS smtp, smtp2## User Aliases
## These arent often necessary, as you can use regular groups
## (ie, from files, LDAP, NIS, etc) in this file - just use %groupname
## rather than USERALIAS
# User_Alias ADMINS jsmith, mikem## Command Aliases
## These are groups of related commands...## Networking
# Cmnd_Alias NETWORKING /sbin/route, /sbin/ifconfig, /bin/ping, /sbin/dhclient, /usr/bin/net, /sbin/iptables, /usr/bin/rfcomm, /usr/bin/wvdial, /sbin/iwconfig, /sbin/mii-tool## Installation and management of software
# Cmnd_Alias SOFTWARE /bin/rpm, /usr/bin/up2date, /usr/bin/yum## Services## Updating the locate database
# Cmnd_Alias LOCATE /usr/bin/updatedb## Storage
# Cmnd_Alias STORAGE /sbin/fdisk, /sbin/sfdisk, /sbin/parted, /sbin/partprobe, /bin/mount, /bin/umount## Delegating permissions
# Cmnd_Alias DELEGATING /usr/sbin/visudo, /bin/chown, /bin/chmod, /bin/chgrp## Processes
# Cmnd_Alias PROCESSES /bin/nice, /bin/kill, /usr/bin/kill, /usr/bin/killall## Drivers
# Cmnd_Alias DRIVERS /sbin/modprobe# Defaults specification#
# Refuse to run if unable to disable echo on the tty.
#
Defaults !visiblepw#
# Preserving HOME has security implications since many programs
# use it when searching for configuration files. Note that HOME
# is already set when the the env_reset option is enabled, so
# this option is only effective for configurations where either
# env_reset is disabled or HOME is present in the env_keep list.
#
Defaults always_set_home
Defaults match_group_by_gid# Prior to version 1.8.15, groups listed in sudoers that were not
# found in the system group database were passed to the group
# plugin, if any. Starting with 1.8.15, only groups of the form
# %:group are resolved via the group plugin by default.
# We enable always_query_group_plugin to restore old behavior.
# Disable this option for new behavior.
Defaults always_query_group_pluginDefaults env_reset
Defaults env_keep COLORS DISPLAY HOSTNAME HISTSIZE KDEDIR LS_COLORS
Defaults env_keep MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE
Defaults env_keep LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES
Defaults env_keep LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE
Defaults env_keep LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY#
# Adding HOME to env_keep may enable a user to run unrestricted
# commands via sudo.
#
# Defaults env_keep HOMEDefaults secure_path /sbin:/bin:/usr/sbin:/usr/bin## Next comes the main part: which users can run what software on
## which machines (the sudoers file can be shared between multiple
## systems).
## Syntax:
##
## user MACHINECOMMANDS
##
## The COMMANDS section may have other options added to it.
##
## Allow root to run any commands anywhere
root ALL(ALL) ALL## Allows members of the sys group to run networking, software,
## service management apps and more.
# %sys ALL NETWORKING, SOFTWARE, SERVICES, STORAGE, DELEGATING, PROCESSES, LOCATE, DRIVERS## Allows people in group wheel to run all commands
%wheel ALL(ALL) ALL## Same thing without a password
# %wheel ALL(ALL) NOPASSWD: ALL
%ams ALL(ALL) NOPASSWD: ALL## Allows members of the users group to mount and unmount the
## cdrom as root
# %users ALL/sbin/mount /mnt/cdrom, /sbin/umount /mnt/cdrom## Allows members of the users group to shutdown this system
# %users localhost/sbin/shutdown -h now## Read drop-in files from /etc/sudoers.d (the # here does not mean a comment)
#includedir /etc/sudoers.d添加用户
useradd 用户名将用户添加到root用户组
usermod -a -G ams 用户名给用户创建家目录
mkdir -p /home/用户名/.ssh/给用户创建authorized_keys文件
touch /home/用户名/.ssh/authorized_keys添加用户的公钥到authorized_keys中
echo ssh-rsa AAAAB3NzaC1yc2.....59AHv6osqY1ZuMrnl7Q exampleexample.com /home/用户名/.ssh/authorized_keys
