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RHCSA8.2
Node1
配置您的系统以使用默认存储库
配置您 的系统以使用默认存储库 YUM 存储库已可以从 http://foundation0.ilt.example.com/dvd/BaseOS 和 `http://foundation0.ilt.example.com/dvd/AppStream 使用配置您的系统，以将这些位置用作默认存储库- 1
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[root@clear ~]# cat /etc/yum.repos.d/BaseOS_AppStream.repo [BaseOS] name=BaseOS baseurl=http://foundation0.ilt.example.com/dvd/BaseOS gpgcheck=0 enabled=1 [AppStream] name=AppStream baseurl=http://foundation0.ilt.example.com/dvd/AppStream gpgcheck=0 enabled=1- 1
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创建用户帐户
创建用户帐户 创建下列用户、组和组成员资格： 名为 sysmgrs 的组 用户 natasha ，作为次要组从属于 sysmgrs 用户 harry ，作为次要组还从属于 sysmgrs 用户 sarah ，无权访问系统上的交互式 shell 且不是 sysmgrs 的成员 natasha 、 harry 和 sarah 的密码应当都是 flectrag- 1
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[root@clear ~]# groupadd sysmgrs [root@clear ~]# useradd -G sysmgrs natasha [root@clear ~]# useradd -G sysmgrs harry [root@clear ~]# useradd -s /bin/false sarah [root@clear ~]# echo flectrag | passwd --stdin natasha Changing password for user natasha. passwd: all authentication tokens updated successfully. [root@clear ~]# echo flectrag | passwd --stdin harry Changing password for user harry. passwd: all authentication tokens updated successfully. [root@clear ~]# echo flectrag | passwd --stdin sarah Changing password for user sarah. passwd: all authentication tokens updated successfully.- 1
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配置 cron 作业
配置 cron 作业 配置 cron 作业，该作业每隔 2 分钟运行并执行以下命令： logger "EX200 in progress"，以用户 natasha 身份运行- 1
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#查看服务状态crond [root@clear ~]# systemctl status crond | grep Active Active: active (running) since Wed 2023-08-30 15:12:01 EDT; 24min ago [root@clear ~]# systemctl enable crond [root@clear ~]# crontab -e -u natasha no crontab for natasha - using an empty one crontab: installing new crontab [root@clear ~]# crontab -l -u natasha */2 * * * * logger "EX200 in progress"- 1
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创建协作目录
创建具有以下特征的协作目录 /home/managers ： /home/managers 的组用权是 sysmgrs 目录应当可被 sysmgrs 的成员读取、写入和访问，但任何其他用户不具这些权限。（当然，root 用户有权访问系统上的所有文件和目录） /home/managers 中创建的文件自动将组所有权设置到 sysmgrs 组- 1
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[root@clear ~]# mkdir /home/managers [root@clear ~]# chown :sysmgrs /home/managers [root@clear ~]# chmod 2770 /home/managers- 1
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配置 NTP
配置 NTP 配置您的系统，使其成为 materials.example.com 的 NTP 客户端。（注：materials.example.com 是 classroom.example.com 的 DNS 别名）- 1
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[root@clear ~]# systemctl status chronyd | grep Active Active: active (running) since Wed 2023-08-30 15:10:30 EDT; 44min ago [root@clear ~]# vim /etc/chrony.conf #添加下面这段 [root@clear ~]# cat /etc/chrony.conf | grep materials server materials.example.com iburst [root@clear ~]# systemctl restart chronyd [root@clear ~]# timedatectl Local time: Wed 2023-08-30 15:56:35 EDT Universal time: Wed 2023-08-30 19:56:35 UTC RTC time: Wed 2023-08-30 19:51:45 Time zone: America/New_York (EDT, -0400) System clock synchronized: yes NTP service: active RTC in local TZ: no- 1
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配置 autofs
配置 autofs 配置 autofs ，以按照如下所述自动挂载远程用户的主目录： materials.example.com ( 172.25.254.254 ) NFS 导出 /rhome 到您的系统。此文件系统包含为用户 remoteuser1 预配置的主目录 remoteuser1 的主目录是 materials.example.com:/rhome/remoteuser1 remoteuser1 的主目录应自动挂载到本地 /rhome 下的 /rhome/remoteuser1 主目录必须可供其用户写入 remoteuser1 的密码是 flectrag- 1
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[root@clear ~]# yum -y install autofs [root@clear ~]# vim /etc/auto.master auto.master auto.master.d/ [root@clear ~]# vim /etc/auto.master #设置自动挂载 [root@clear ~]# cat /etc/auto.master | grep rhome /rhome /etc/auto.rhome [root@clear ~]# vim /etc/auto.rhome #设置权限 [root@clear ~]# cat /etc/auto.rhome remoteuser1 -rw materials.example.com:/rhome/remoteuser1 [root@clear ~]# systemctl enable --now autofs Created symlink /etc/systemd/system/multi-user.target.wants/autofs.service → /usr/lib/systemd/system/autofs.service. [root@clear ~]# systemctl restart autofs [root@clear ~]# echo flectrag | passwd --stdin remoteuser1 Changing password for user remoteuser1. passwd: all authentication tokens updated successfully. [root@clear ~]# su - remoteuser1 [remoteuser1@clear ~]$ pwd /rhome/remoteuser1 [remoteuser1@clear ~]$ exit logout- 1
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配置 /var/tmp/fstab 权限
配置 /var/tmp/fstab 权限 将文件 /etc/fstab 复制到 /var/tmp/fstab 。配置 /var/tmp/fstab 的权限以满足如下条件： 文件 /var/tmp/fstab 自 root 用户所有 文件 /var/tmp/fstab 属于组 root 文件 /var/tmp/fstab 应不能被任何人执行 用户 natasha 能够读取和写入 /var/tmp/fstab 用户 harry 无法写入或读取 /var/tmp/fstab 所有其他用户（当前或未来）能够读取 /var/tmp/fstab- 1
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[root@clear ~]# cp /etc/fstab /var/tmp/fstab [root@clear ~]# ll /var/tmp/fstab [root@clear ~]# setfacl -m u:natasha:rw /var/tmp/fstab [root@clear ~]# setfacl -m u:harry:- /var/tmp/fstab [root@clear ~]# getfacl /var/tmp/fstab getfacl: Removing leading '/' from absolute path names # file: var/tmp/fstab # owner: root # group: root user::rw- user:natasha:rw- user:harry:--- group::r-- mask::rw- other::r--- 1
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配置用户帐户
配置用户帐号 配置用户 manalo ，其用户 ID 为 3533。此用户的密码应当为 flectrag。- 1
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[root@clear ~]# useradd -u 3533 manalo [root@clear ~]# echo flectrag | passwd --stdin manalo Changing password for user manalo. passwd: all authentication tokens updated successfully. [root@clear ~]# tail -1 /etc/passwd manalo:x:3533:3533::/home/manalo:/bin/bash- 1
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查找文件
查找文件 查找当 jacques 所有的所有文件并将其副本放入 /root/findfiles 目录- 1
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[root@clear ~]# mkdir /root/findfiles [root@clear ~]# find / -user jacques -exec cp -a {} /root/findfiles \; find: ‘/proc/25337/task/25337/fd/6’: No such file or directory find: ‘/proc/25337/task/25337/fdinfo/6’: No such file or directory find: ‘/proc/25337/fd/7’: No such file or directory find: ‘/proc/25337/fdinfo/7’: No such file or directory [root@clear ~]# ll /root/findfiles/ total 0 -rw-r--r--. 1 jacques jacques 0 Aug 30 16:23 gamelan -rw-r--r--. 1 jacques jacques 0 Aug 30 16:23 jacques -rw-r--r--. 1 jacques jacques 0 Aug 30 16:23 libWedgeit.so.1.2.3- 1
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查找字符串
查找字符串 查找文件 /usr/share/xml/iso-codes/iso_639_3.xml 中包含字符串 ng 的所有行。将所有这些行的副本按原始顺序放在文件 /root/list 中。 /root/list 不得包含空行，且所有行必须是 /usr/share/xml/iso-codes/iso_639_3.xml 中原始行的确切副本。- 1
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[root@clear ~]# grep ng /usr/share/xml/iso-codes/iso_639_3.xml > /root/list- 1
创建存档
创建存档 创建一个名为 /root/backup.tar.gz 的 tar 存档，其应包含 /usr/local 的 tar 存档，其应包含 /usr/local 的内容。该 tar 存档必须使用 gzip 进行压缩。- 1
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[root@clear ~]# tar -czvf /root/backup.tar.gz /usr/local [root@clear ~]# file /root/backup.tar.gz /root/backup.tar.gz: gzip compressed data, last modified: Wed Aug 30 20:30:16 2023, from Unix, original size 51200- 1
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添加免密操作
允许
sysmgrs组成员sudo时不需要密码visudo #进⼊编辑sudo 在110⾏下编写或者是在 #%wheel下编写 %sysmgrs ALL=(ALL) NOPASSWD: ALL- 1
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配置创建新用户密码策略
创建新用户，默认密码策略20天后密码过期
[root@clear ~]# cat /etc/login.defs | grep PASS_MAX_DAYS # PASS_MAX_DAYS Maximum number of days a password may be used. PASS_MAX_DAYS 20 [root@clear ~]# useradd usr1 [root@clear ~]# chage usr1 Changing the aging information for usr1 Enter the new value, or press ENTER for the default Minimum Password Age [0]: ^X chage: error changing fields [root@clear ~]# chage usr1 Changing the aging information for usr1 Enter the new value, or press ENTER for the default Minimum Password Age [0]: Maximum Password Age [20]: Last Password Change (YYYY-MM-DD) [2023-08-30]: Password Expiration Warning [7]: Password Inactive [-1]: Account Expiration Date (YYYY-MM-DD) [-1]:- 1
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Node2
设置 root 密码
设置 root 密码 将 node2 的 root 密码设置为 flectrag 。您需要获得系统访问权限才能进行此操作。- 1
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配置您的系统以使用默认存储库
配置您 的系统以使用默认存储库 YUM 存储库已可以从 http://foundation0.ilt.example.com/dvd/BaseOS 和 http://foundation0.ilt.example.com/dvd/AppStream 使用配置您的系统，以将这些位置用作默认存储库- 1
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与node1存储文件相同，将其复制过去
[root@clear ~]# scp /etc/yum.repos.d/BaseOS_AppStream.repo node2:/etc/yum.repos.d/ The authenticity of host 'node2 (172.25.250.200)' can't be established. ECDSA key fingerprint is SHA256:1H687jfusVXYAUzAuByFfx1U/lB4VS+6h04wRhXhmZU. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes Warning: Permanently added 'node2,172.25.250.200' (ECDSA) to the list of known hosts. root@node2's password: BaseOS_AppStream.repo 100% 203 15.1KB/s 00:00- 1
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在node2上查看
[root@node2 ~]# ls /etc/yum.repos.d/ BaseOS_AppStream.repo [root@node2 ~]# yum repolist repo id repo name AppStream AppStream BaseOS BaseOS- 1
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调整逻辑卷大小
设置逻辑卷大小 将逻辑卷 vo 及其文件系统的大小调整到 230 MiB。确保文件系统内容保持不变。注：分区大小很少与请求的大小完全相同，因此可以接受范围为 217 MiB 到 243 MiB 的大小。- 1
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#查看文件格式和存储大小 [root@node2 ~]# df -Th Filesystem Type Size Used Avail Use% Mounted on devtmpfs devtmpfs 887M 0 887M 0% /dev tmpfs tmpfs 914M 0 914M 0% /dev/shm tmpfs tmpfs 914M 17M 897M 2% /run tmpfs tmpfs 914M 0 914M 0% /sys/fs/cgroup /dev/vda3 xfs 9.9G 1.6G 8.4G 16% / /dev/vda2 vfat 100M 6.8M 94M 7% /boot/efi /dev/mapper/myvol-vo ext4 175M 1.6M 160M 1% /reports tmpfs tmpfs 183M 0 183M 0% /run/user/0 #查看myvol组 [root@node2 ~]# vgs myvol VG #PV #LV #SN Attr VSize VFree myvol 1 1 0 wz--n- 508.00m 324.00m #拓展 [root@node2 ~]# lvextend -L 230M /dev/myvol/vo Rounding size to boundary between physical extents: 232.00 MiB. Size of logical volume myvol/vo changed from 184.00 MiB (46 extents) to 232.00 MiB (58 extents). Logical volume myvol/vo successfully resized. #同步信息到系统内核 [root@node2 ~]# resize2fs /dev/myvol/vo resize2fs 1.45.4 (23-Sep-2019) Filesystem at /dev/myvol/vo is mounted on /reports; on-line resizing required old_desc_blocks = 2, new_desc_blocks = 2 The filesystem on /dev/myvol/vo is now 237568 (1k) blocks long. [root@node2 ~]# df -Th /reports/ Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/myvol-vo ext4 221M 2.1M 204M 1% /reports- 1
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添加交换分区
添加交换分区 向您的系统添加一个额外的交换分区 756MiB 。交换分区应在系统启动时自动挂载。不要删除或以任何方式改动系统上的任何现有交换分区。- 1
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#查看磁盘情况 [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE M OUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports └─vdb2 252:18 0 512M 0 part └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] vdc 252:32 0 10G 0 disk- 1
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#创建一个新分区 [root@node2 ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.32.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): n Partition type p primary (2 primary, 0 extended, 2 free) e extended (container for logical partitions) Select (default p): Using default response p. Partition number (3,4, default 3): First sector (2095106-8388607, default 2097152): Last sector, +sectors or +size{K,M,G,T,P} (2097152-8388607, default 8388607): +756M Created a new partition 3 of type 'Linux' and of size 756 MiB. Command (m for help): w The partition table has been altered. Syncing disks. [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] └─vdb3 252:19 0 756M 0 part vdc 252:32 0 10G 0 disk #格式化交换分区 [root@node2 ~]# mkswap /dev/vdb3 Setting up swapspace version 1, size = 756 MiB (792719360 bytes) no label, UUID=b6992756-ad20-458d-aeac-e1b362d235e2 [root@node2 ~]# vim /etc/fstab [root@node2 ~]# cat /etc/fstab | grep vdb3 #启动自动挂载 /dev/vdb3 none swap defaults 0 0 [root@node2 ~]# swapon -a #将/etc/fstab⽂件中所有设置为swap的设备，启动为交换区 [root@node2 ~]# swapon #激活交换空间 NAME TYPE SIZE USED PRIO /dev/dm-1 partition 256M 0B -2 /dev/vdb3 partition 756M 0B -3- 1
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创建逻辑卷
创建逻辑卷 根据如下要求，创建新的逻辑卷： 逻辑卷取名为 qa ，属于 qagroup 卷组，大小为 60 个扩展块 qagroup 卷组中逻辑卷的扩展块大小应当为 16 MiB 使用 ext3 文件系统格式化新逻辑卷。该逻辑卷应在系统启动时自动挂载到 /mnt/qa 下- 1
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[root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] └─vdb3 252:19 0 756M 0 part [SWAP] vdc 252:32 0 10G 0 disk [root@node2 ~]# fdisk /dev/vdb #新建分区 Welcome to fdisk (util-linux 2.32.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): n Partition type p primary (3 primary, 0 extended, 1 free) e extended (container for logical partitions) Select (default e): p Selected partition 4 First sector (2095106-8388607, default 3645440): Last sector, +sectors or +size{K,M,G,T,P} (3645440-8388607, default 8388607): Created a new partition 4 of type 'Linux' and of size 2.3 GiB. Command (m for help): w The partition table has been altered. Syncing disks. [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] ├─vdb3 252:19 0 756M 0 part [SWAP] └─vdb4 252:20 0 2.3G 0 part vdc 252:32 0 10G 0 disk- 1
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[root@node2 ~]# pvcreate /dev/vdb4 #创建物理卷 Physical volume "/dev/vdb4" successfully created. [root@node2 ~]# vgcreate -s 16M qagroup /dev/vdb4 #创建卷组 Volume group "qagroup" successfully created [root@node2 ~]# lvcreate -l 60 -n qa qagroup #创建逻辑卷 Logical volume "qa" created. [root@node2 ~]# mkfs.ext3 /dev/qagroup/qa #格式化逻辑卷 mke2fs 1.45.4 (23-Sep-2019) Creating filesystem with 245760 4k blocks and 61440 inodes Filesystem UUID: 4c20ff08-a20d-48e2-83f6-3f5b3064c193 Superblock backups stored on blocks: 32768, 98304, 163840, 229376 Allocating group tables: done Writing inode tables: done Creating journal (4096 blocks): done Writing superblocks and filesystem accounting information: done [root@node2 ~]# mkdir /mnt/qa [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] ├─vdb3 252:19 0 756M 0 part [SWAP] └─vdb4 252:20 0 2.3G 0 part └─qagroup-qa 253:2 0 960M 0 lvm vdc 252:32 0 10G 0 disk [root@node2 ~]# vim /etc/fstab #设置自动挂载 [root@node2 ~]# cat /etc/fstab | grep qa /dev/qagroup/qa /mnt/qa ext3 defaults 0 0 [root@node2 ~]# mount -a [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] ├─vdb3 252:19 0 756M 0 part [SWAP] └─vdb4 252:20 0 2.3G 0 part └─qagroup-qa 253:2 0 960M 0 lvm /mnt/qa vdc 252:32 0 10G 0 disk- 1
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创建 VDO 卷
创建 VDO 卷 根据如下要求，创建新的 VDO 卷： 使用未分区的磁盘 该卷的名称为 vdough 该卷的逻辑大小为 50G 该卷使用 xfs 文件系统格式化 该卷（在系统启动时）挂载到 /vbread 下- 1
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[root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] ├─vdb3 252:19 0 756M 0 part [SWAP] └─vdb4 252:20 0 2.3G 0 part └─qagroup-qa 253:2 0 960M 0 lvm /mnt/qa vdc 252:32 0 10G 0 disk #使用未分区的磁盘 [root@node2 ~]# yum install vdo -y [root@node2 ~]# vdo create --name=vdough --device=/dev/vdc --vdoLogicalSize=50G Creating VDO vdough The VDO volume can address 6 GB in 3 data slabs, each 2 GB. It can grow to address at most 16 TB of physical storage in 8192 slabs. If a larger maximum size might be needed, use bigger slabs. Starting VDO vdough Starting compression on VDO vdough VDO instance 0 volume is ready at /dev/mapper/vdough # 该卷使用 xfs 文件系统格式化 [root@node2 ~]# mkfs.xfs /dev/mapper/vdough meta-data=/dev/mapper/vdough isize=512 agcount=4, agsize=3276800 blks = sectsz=4096 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=1, rmapbt=0 = reflink=1 data = bsize=4096 blocks=13107200, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1 log =internal log bsize=4096 blocks=6400, version=2 = sectsz=4096 sunit=1 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 #挂载 [root@node2 ~]# mkdir /vbread [root@node2 ~]# vim /etc/fstab [root@node2 ~]# mount -a [root@node2 ~]# df -Th /vbread/ Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/vdough xfs 50G 390M 50G 1% /vbread [root@node2 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT vda 252:0 0 10G 0 disk ├─vda1 252:1 0 1M 0 part ├─vda2 252:2 0 100M 0 part /boot/efi └─vda3 252:3 0 9.9G 0 part / vdb 252:16 0 4G 0 disk ├─vdb1 252:17 0 510M 0 part │ └─myvol-vo 253:0 0 232M 0 lvm /reports ├─vdb2 252:18 0 512M 0 part │ └─vgroup-swap 253:1 0 256M 0 lvm [SWAP] ├─vdb3 252:19 0 756M 0 part [SWAP] └─vdb4 252:20 0 2.3G 0 part └─qagroup-qa 253:2 0 960M 0 lvm /mnt/qa vdc 252:32 0 10G 0 disk └─vdough 253:3 0 50G 0 vdo /vbread- 1
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配置系统调优
配置系统调优 为您的系统选择建议的 tuned 配置集并将它设为默认设置。- 1
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[root@node2 ~]# yum -y install tuned Last metadata expiration check: 0:53:38 ago on Wed 30 Aug 2023 04:57:11 PM EDT. Package tuned-2.13.0-6.el8.noarch is already installed. Dependencies resolved. Nothing to do. Complete! [root@node2 ~]# systemctl enable tuned [root@node2 ~]# systemctl restart tuned [root@node2 ~]# tuned-adm active Current active profile: throughput-performance [root@node2 ~]# tuned-adm recommend virtual-guest [root@node2 ~]# tuned-adm profile virtual-guest [root@node2 ~]# tuned-adm active Current active profile: virtual-guest- 1
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- 原文地址：https://blog.csdn.net/weixin_51882166/article/details/132724578
