一、设置环境：

请初始化您的考试虚拟机 server0.example.com，将系统的 root 账号密码设置为 123456 。配置您的虚拟机系统使用下述静态网络配置：

* Hostname：server0.example.com * IP address：172.25.0.11 * Netmask：255.255.255.0 * Gateway：172.25.0.254 * Name server：172.25.254.254

解题：

1.1.修改密码

按“e”进入编辑模式在utf-8后面添加空格 rd.breakCtrl + x执行

以读写权限重新挂载硬盘上的真实系统根目录：mount -o remount,rw / /sysroot切换至真实系统根目录：chroot /sysroot按要求修改root密码：echo 123456 | passwd --stdin root重新打标：touch /.autorelabel退出真实系统：exit退出系统重新引导：exit以新密码登录系统

1.2.设置主机名

[root@server0 ~]# hostnamectl set-hostname server0.example.com  [root@server0 ~]# bash[root@server0 ~]# hostnameserver0.example.com[root@server0 ~]# 

1.3.设置网络

[root@server0 ~]# nmcli connection modify eth0 ipv4.addresses "172.25.0.11/24 172.25.0.254"  ipv4.dns "172.25.254.254" connection.autoconnect yes ipv4.method manual[root@server0 ~]# nmcli connection reload [root@server0 ~]# service network restart Restarting network (via systemctl):                        [  OK  ][root@server0 ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0DEVICE=eth0BOOTPROTO=noneONBOOT=yesTYPE=EthernetUSERCTL=yesIPV6INIT=noNAME=eth0PERSISTENT_DHCLIENT=1IPADDR0=172.25.0.11PREFIX0=24GATEWAY0=172.25.0.254DNS1=172.25.254.254DOMAIN=server0.example.comDEFROUTE=yesIPV4_FAILURE_FATAL=noUUID=5fb06bd0-0bb0-7ffb-45f1-d6edd65f3e03[root@server0 ~]# 

二、设置SELinux

请保证系统 SELinux 运行在 Enforcing 状态，要求系统重启仍然生效

解题：

[root@server0 ~]# setenforce 1[root@server0 ~]# getenforce Enforcing[root@server0 ~]#[root@server0 ~]# vim /etc/selinux/config 

[root@server0 ~]# reboot

三、配置yum源

配置你的本地默认 YUM 仓库指向

解题：

[root@server0 ~]# yum-config-manager --help | grep add    --downloaddir=DLDIR    --add-repo=ADDREPO  add (and enable) the repo from the specified file or[root@server0 ~]# yum-config-manager --add-repo=";Loaded plugins: langpacksadding repo from: [classroom.example.com_content_rhel7.0_x86_64_dvd_]name=added from: [root@server0 ~]# echo "gpgcheck=0">>/etc/yum.repos.d/classroom.example.com_content_rhel7.0_x86_64_dvd_.repo [root@server0 ~]# yum clean allLoaded plugins: langpacksCleaning repos: classroom.example.com_content_rhel7.0_x86_64_dvd_ rhel_dvdCleaning up everything[root@server0 ~]# yum makecache Loaded plugins: langpacksclassroom.example.com_content_rhel7.0_x86_64_dvd_                                  | 4.1 kB  00:00:00     rhel_dvd                                                                           | 4.1 kB  00:00:00     (1/9): classroom.example.com_content_rhel7.0_x86_64_dvd_/group_gz                  | 134 kB  00:00:00     (2/9): classroom.example.com_content_rhel7.0_x86_64_dvd_/primary_db                | 3.4 MB  00:00:00     (3/9): classroom.example.com_content_rhel7.0_x86_64_dvd_/other_db                  | 1.3 MB  00:00:00     (4/9): classroom.example.com_content_rhel7.0_x86_64_dvd_/productid                 | 1.6 kB  00:00:00     (5/9): classroom.example.com_content_rhel7.0_x86_64_dvd_/filelists_db              | 3.0 MB  00:00:00     (6/9): rhel_dvd/group_gz                                                           | 134 kB  00:00:00     (7/9): rhel_dvd/primary_db                                                         | 3.4 MB  00:00:00     (8/9): rhel_dvd/other_db                                                           | 1.3 MB  00:00:00     (9/9): rhel_dvd/filelists_db                                                       | 3.0 MB  00:00:00     Metadata Cache Created[root@server0 ~]# yum repolistLoaded plugins: langpacksrepo id                                           repo name                                         statusclassroom.example.com_content_rhel7.0_x86_64_dvd_ added from:  4,305rhel_dvd                                          Remote classroom copy of dvd                      4,305repolist: 8,610[root@server0 ~]# 

四、调整逻辑卷

1. 新建一个逻辑卷，名字为lv0 ,其属于 vg0 卷组，该逻辑卷由 16 个 LE 组成。卷组 vg0 的单个 PE 大小为 16 MiB。将新创建的逻辑卷格式化为 xfs 文件系统，在系统启动时，该逻辑卷会被自动挂载到 /mnt/lvm 目录下。

2. 将逻辑卷 lv0 和其文件系统大小调整到 384 MiB。要确保文件系统中的内容保持完整。请注意：分区大小很少能够完全符合要求的大小，所以大小在 352 MiB 和 416 MiB 之间都是可以接受的。

解题：

4.1.划分1G的LVM

[root@server0 ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Device does not contain a recognized partition tableBuilding a new DOS disklabel with disk identifier 0x095042ab.Command (m for help): pDisk /dev/vdb: 10.7 GB, 10737418240 bytes, 20971520 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x095042ab   Device Boot      Start         End      Blocks   Id  SystemCommand (m for help): nPartition type:   p   primary (0 primary, 0 extended, 4 free)   e   extendedSelect (default p): ePartition number (1-4, default 1): First sector (2048-20971519, default 2048): Using default value 2048Last sector, +sectors or +size{K,M,G} (2048-20971519, default 20971519): +1GPartition 1 of type Extended and of size 1 GiB is setCommand (m for help): nPartition type:   p   primary (0 primary, 1 extended, 3 free)   l   logical (numbered from 5)Select (default p): lAdding logical partition 5First sector (4096-2099199, default 4096): Using default value 4096Last sector, +sectors or +size{K,M,G} (4096-2099199, default 2099199): Using default value 2099199Partition 5 of type Linux and of size 1023 MiB is setCommand (m for help): tPartition number (1,5, default 5): 5Hex code (type L to list all codes): 8eChanged type of partition 'Linux' to 'Linux LVM'Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.Syncing disks.[root@server0 ~]# partprobe [root@server0 ~]# 

4.2.按要求添加逻辑卷

[root@server0 ~]# pvcreate /dev/vdb5  Physical volume "/dev/vdb5" successfully created[root@server0 ~]# vgcreate --help | grep size        [-s|--physicalextentsize PhysicalExtentSize[bBsSkKmMgGtTpPeE]] [root@server0 ~]# vgcreate vg0 -s 16M /dev/vdb5  Volume group "vg0" successfully created[root@server0 ~]# vgdisplay  --- Volume group ---  VG Name               vg0  System ID               Format                lvm2  Metadata Areas        1  Metadata Sequence No  1  VG Access             read/write  VG Status             resizable  MAX LV                0  Cur LV                0  Open LV               0  Max PV                0  Cur PV                1  Act PV                1  VG Size               1008.00 MiB  PE Size               16.00 MiB  Total PE              63  Alloc PE / Size       0 / 0     Free  PE / Size       63 / 1008.00 MiB  VG UUID               jvZd9h-nV9v-ankV-skjP-btgB-vF8R-W67IRT   [root@server0 ~]# lvcreate -n lv0 -l 16 vg0  Logical volume "lv0" created[root@server0 ~]# lvdisplay  --- Logical volume ---  LV Path                /dev/vg0/lv0  LV Name                lv0  VG Name                vg0  LV UUID                n8oBJF-9caQ-COg8-2peS-pWTz-mQDj-rXHUKL  LV Write Access        read/write  LV Creation host, time server0.example.com, 2019-12-03 21:47:56 +0800  LV Status              available  # open                 0  LV Size                256.00 MiB  Current LE             16  Segments               1  Allocation             inherit  Read ahead sectors     auto  - currently set to     8192  Block device           252:0   [root@server0 ~]# mkfs.xfs /dev/vg0/lv0meta-data=/dev/vg0/lv0           isize=256    agcount=4, agsize=16384 blks         =                       sectsz=512   attr=2, projid32bit=1         =                       crc=0data     =                       bsize=4096   blocks=65536, imaxpct=25         =                       sunit=0      swidth=0 blksnaming   =version 2              bsize=4096   ascii-ci=0 ftype=0log      =internal log           bsize=4096   blocks=853, version=2         =                       sectsz=512   sunit=0 blks, lazy-count=1realtime =none                   extsz=4096   blocks=0, rtextents=0[root@server0 ~]# 

4.3.设置自动挂载

[root@server0 ~]# mkdir -p /mnt/lvm[root@server0 ~]# blkid/dev/vda1: UUID="9bf6b9f7-92ad-441b-848e-0257cbb883d1" TYPE="xfs" /dev/vdb5: UUID="KydhrK-3Nar-ktHy-b6Gq-skNj-sIQu-MgWCmm" TYPE="LVM2_member" /dev/mapper/vg0-lv0: UUID="11ddc813-2a94-46f7-a7de-e735eb8bfe8c" TYPE="xfs"[root@server0 ~]# echo "UUID="11ddc813-2a94-46f7-a7de-e735eb8bfe8c" /mnt/lvm xfs defaults 0 0">>/etc/fstab[root@server0 ~]# mount -av/                        : ignoredmount: /mnt/lvm does not contain SELinux labels.       You just mounted an file system that supports labels which does not       contain labels, onto an SELinux box. It is likely that confined       applications will generate AVC messages and not be allowed access to       this file system.  For more details see restorecon(8) and mount(8)./mnt/lvm                 : successfully mounted[root@server0 ~]# df -lh | grep lv0/dev/mapper/vg0-lv0  253M   13M  240M   6% /mnt/lvm[root@server0 ~]#

4.4.扩容

[root@server0 ~]# lvextend -L 384M /dev/vg0/lv0   Extending logical volume lv0 to 384.00 MiB  Logical volume lv0 successfully resized[root@server0 ~]# xfs_growfs /dev/vg0/lv0meta-data=/dev/mapper/vg0-lv0    isize=256    agcount=4, agsize=16384 blks         =                       sectsz=512   attr=2, projid32bit=1         =                       crc=0data     =                       bsize=4096   blocks=65536, imaxpct=25         =                       sunit=0      swidth=0 blksnaming   =version 2              bsize=4096   ascii-ci=0 ftype=0log      =internal               bsize=4096   blocks=853, version=2         =                       sectsz=512   sunit=0 blks, lazy-count=1realtime =none                   extsz=4096   blocks=0, rtextents=0data blocks changed from 65536 to 98304[root@server0 ~]# df -lh | grep lv0/dev/mapper/vg0-lv0  381M   14M  368M   4% /mnt/lvm[root@server0 ~]# 

五、按照以下要求创建用户、组

• 新建一个名为adminuser的组，id为40000• 新建一个natasha的用户，并将adminuser作为其附属组• 新建一个harry用户，并将adminuser作为其附属组• 新建一个sarah的用户，其不属于adminuser组，在系统送没有任何可交互的shell• natasha、harry、和sarah三个用户的密码均设为rehat

解题：

[root@server0 ~]# groupadd --help | grep id  -g, --gid GID                 use GID for the new group  -K, --key KEY=VALUE           override /etc/login.defs defaults[root@server0 ~]# groupadd -g 40000 adminuser [root@server0 ~]# cat /etc/group | grep 4000adminuser:x:40000:[root@server0 ~]# useradd --help | grep group  -g, --gid GROUP               name or ID of the primary group of the new  -G, --groups GROUPS           list of supplementary groups of the new  -N, --no-user-group           do not create a group with the same name as  -U, --user-group              create a group with the same name as the user[root@server0 ~]# useradd -G adminuser natasha [root@server0 ~]# useradd -G adminuser harry[root@server0 ~]# useradd --help | grep shell  -s, --shell SHELL             login shell of the new account[root@server0 ~]# useradd -s /sbin/nologin sarah[root@server0 ~]# cat /etc/passwd | grep sarahsarah:x:1003:1003::/home/sarah:/sbin/nologin[root@server0 ~]# echo rehat | passwd --stdin natashaChanging password for user natasha.passwd: all authentication tokens updated successfully.[root@server0 ~]# echo rehat | passwd --stdin harryChanging password for user harry.passwd: all authentication tokens updated successfully.[root@server0 ~]# echo rehat | passwd --stdin sarahChanging password for user sarah.passwd: all authentication tokens updated successfully.[root@server0 ~]# 

六、配置文件权限

• 该文件的所属组为root• 该文件的所属人为root• 该文件对任何人均没有执行权限• 用户natasha对该文件有读和写权限• 用户harry对该文件既不能读也不能写• 所有用户（包括当前用户和未来创建的用户）对该文件都有读的权限

解题：

[root@server0 ~]# cp -a  /etc/fstab /var/tmp/[root@server0 ~]# chown root:root /var/tmp/fstab [root@server0 ~]# chmod a-x /var/tmp/fstab [root@server0 ~]# setfacl -Rm u:natasha:rw,u:harry:-- /var/tmp/fstab[root@server0 ~]# chmod a+r /var/tmp/fstab[root@server0 ~]# getfacl /var/tmp/fstab getfacl: Removing leading '/' from absolute path names# file: var/tmp/fstab# owner: root# group: rootuser::rw-user:natasha:rw-user:harry:---group::r--mask::rw-other::r--[root@server0 ~]# 

七、建立计划任务

• 对natasha用户建立计划任务，要求在本地时间的每天14:23执行 /bin/echo "rhcsa" 命令

[root@server0 ~]# crontab -e -u natasha[root@server0 ~]# crontab -l -u natasha   #       mim     hour    day     month   week    command         23      14      *       *       *       /bin/echo "rhcsa"[root@server0 ~]# 

八、创建共享目录

• /home/admins目录的所属组为adminuser• 该目录对adminuser组的成员可读可写可执行，但是对其它用户没有任何权限，但是root不受限制• 在/home/admins目录下创建的文件所属组自动被设置为adminuser

解题：

[root@server0 ~]# mkdir /home/admins[root@server0 ~]# chgrp adminuser /home/admins/[root@server0 ~]# chmod g=rwx,o=-- /home/admins/  [root@server0 ~]# chmod g+s /home/admins/[root@server0 ~]# ls -ld /home/admins/ drwxrws---. 2 root adminuser 6 Dec  3 22:17 /home/admins/[root@server0 ~]# getfacl /home/admins/getfacl: Removing leading '/' from absolute path names# file: home/admins/# owner: root# group: adminuser# flags: -s-user::rwxgroup::rwxother::---[root@server0 ~]# 

九、升级系统内核

• 当系统重新启动之后，升级的内核要作为默认的内核• 原来的内核要被保留，并且仍然可以正常启动• A 新内核的 RPM 包在注意事项：使用连接的时候一定要在连接尾部添加“/”

解题：

[root@server0 ~]# curl -s   | grep kernel                     <tr><td valign="top"><img src="/icons/unknown.gif" alt="[   ]"></td><td><a href="kernel-3.10.0-123.1.2.el7.x86_64.rpm">kernel-3.10.0-123.1...></a></td><td align="right">2014-06-11 04:34  </td><td align="right"> 29M</td><td> </td></tr><tr><td valign="top"><img src="/icons/unknown.gif" alt="[   ]"></td><td><a href="kernel-doc-3.10.0-123.1.2.el7.noarch.rpm">kernel-doc-3.10.0-12..></a></td><td align="right">2014-06-11 04:35  </td><td align="right"> 12M</td><td> </td></tr>[root@server0 ~]# wget   23:52:28--   classroom.example.com (classroom.example.com)... 172.25.254.254Connecting to classroom.example.com (classroom.example.com)|172.25.254.254|:80... connected.HTTP request sent, awaiting response... 200 OKLength: 30266784 (29M) [application/x-rpm]Saving to: ‘kernel-3.10.0-123.1.2.el7.x86_64.rpm’100%[=================================================>] 30,266,784  82.1MB/s   in 0.4s   2019-12-03 23:52:29 (82.1 MB/s) - ‘kernel-3.10.0-123.1.2.el7.x86_64.rpm’ saved [30266784/30266784][root@server0 ~]# lsanaconda-ks.cfg  Documents  kernel-3.10.0-123.1.2.el7.x86_64.rpm  Pictures  TemplatesDesktop          Downloads  Music                                 Public    Videos[root@server0 ~]# chmod 755 kernel-3.10.0-123.1.2.el7.x86_64.rpm [root@server0 ~]# rpm -ivh kernel-3.10.0-123.1.2.el7.x86_64.rpm warning: kernel-3.10.0-123.1.2.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID fd431d51: NOKEYPreparing...                          ################################# [100%]Updating / installing...   1:kernel-3.10.0-123.1.2.el7        ################################# [100%][root@server0 ~]# grub2-editenv listsaved_entry=Red Hat Enterprise Linux Server (3.10.0-123.1.2.el7.x86_64) 7.0 (Maipo)[root@server0 ~]# reboot

十、绑定外部验证

• 在 classroom.example.com 上已部署了一台 LDAP 认证服务器，按以下要求配置你的系统

• 加入到该 LDAP 服务中，并使用 Kerberos 认证用户密码

• 该 LDAP 认证服务的Base DN为:dc=example,dc=com .

• 该 LDAP 认证服务的LADP Server为 :classroom.example.com

• 该认证服务的 Kerbros Realm 为:EXAMPLE.COM

• 该认证服务的 Kerbros KDC为:classroom.example.com

• 该认证服务的 Kerbros Admin Server为:classroom.example.com

• 认证的会话连接需要被加密，证书的下载地址为

解题：

10.1.安装必备软件

[root@server0 ~]# yum install authconfig-gtk sssd krb5-workstation -y[root@server0 ~]# authconfig-gtk

10.2.配置LDAP

上面配置完成再进行（没有配置的话sssd服务无法启动）：[root@server0~]# systemctl enable sssd[root@server0~]# systemctl restart sssd[root@server0~]# systemctl status sssd [root@server0~]# su ldapuser0bash-4.2$ 验证用户：ldapuser0

[root@server0 ~]# systemctl restart sssd[root@server0 ~]# su ldapuser0bash-4.2$ exitexit[root@server0 ~]# getent passwd ldapuser0ldapuser0:*:1700:1700:LDAP Test User 0:/home/guests/ldapuser0:/bin/bash[root@server0 ~]#

十一、配置autofsclassroom.example.com 使用 NFS 共享了/home/guests 给你的系统。这个文件系统包含了预先设置好的用户 ldapuser0 的家目录；ldapuser0 的家目录是 classroom.example.com:/home/guests/ldapuser0 ；ldapuser0 的家目录应该自动挂载到本地的 /home/guests/ldapuser0 家目录必须对用户具有可写权限；ldapuser0 的密码是 'kerberos’

解题：

11.1.安装软件

[root@server0 ~]# yum install autofs -y[root@server0 ~]# systemctl enable autofs.service

11.2.设置挂载

[root@server0 ~]# cp -a /etc/auto.misc /etc/auto.aa[root@server0 ~]# echo "/home/guests /etc/auto.aa" >>/etc/auto.master [root@server0 ~]# echo "*  -type=nfs,rw  classroom.example.com:/home/guests/&">>/etc/auto.aa[root@server0 ~]# systemctl restart autofs.service[root@server0 ~]# ssh ldapuser0@localhostldapuser0@localhost's password: （kerberos）Last login: Wed Dec  4 00:50:57 2019 from localhost[ldapuser0@server0 ~]$ cd /home/guests/[ldapuser0@server0 guests]$ lsldapuser0  [ldapuser0@server0 guests]$ 

十二、配置NTP

配置你的系统时间与服务器 classroom.example.com 同步

解题：

12.1.如图

12.2.设置开机启动

[root@server0 ~]# systemctl enable chronyd[root@server0 ~]# systemctl restart chronyd.service [root@server0 ~]# chronyc sources -v210 Number of sources = 1  .-- Source mode  '^' = server, '=' = peer, '#' = local clock. / .- Source state '*' = current synced, '+' = combined , '-' = not combined,| /   '?' = unreachable, 'x' = time may be in error, '~' = time too variable.||                                                 .- xxxx [ yyyy ] +/- zzzz||                                                /   xxxx = adjusted offset,||         Log2(Polling interval) -.             |    yyyy = measured offset,||                                  \            |    zzzz = estimated error.||                                   |           |                         MS Name/IP address         Stratum Poll Reach LastRx Last sample===============================================================================^* classroom.example.com         8   6    17    17   +796ns[  -21us] +/- 1176us[root@server0 ~]# 

十三、创建归档

• 创建一个名为 /root/sysconfig.tar.bz2的归档文件，其中包含了/etc/sysconfig目录中的内容。tar归档文件必须使用bzip2进行压缩。

解题：

[root@server0 ~]# man tar | grep zip2          -j, --bzip2              filter the archive through bzip2       -j, --bzip2              filter the archive through bzip2[root@server0 ~]# tar -jcf /root/sysconfg.tar.bz2  /etc/sysconfig/ 

十四、创建一个用户用户id=3456 用户名：jay密码为：glegunle

解题：

[root@server0 ~]# useradd -u 3456 jay[root@server0 ~]# echo "glegunge"|passwd --stdin jay   Changing password for user jay.passwd: all authentication tokens updated successfully.[root@server0 ~]# id jay uid=3456(jay) gid=3456(jay) groups=3456(jay)[root@server0 ~]# 

十五、添加swap分区

• swap分区的容量为512M• 当您的系统启动时，swap分区可以自动挂载• 不要移动或是修改其它已经存在于您的系统中的swap分区

解题：

[root@server0 ~]# fdisk /dev/vdb Welcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Command (m for help): nPartition type:   p   primary (0 primary, 1 extended, 3 free)   l   logical (numbered from 5)Select (default p): pPartition number (2-4, default 2): First sector (2099200-20971519, default 2099200): Using default value 2099200Last sector, +sectors or +size{K,M,G} (2099200-20971519, default 20971519): +512MPartition 2 of type Linux and of size 512 MiB is setCommand (m for help): tPartition number (1,2,5, default 5): 2Hex code (type L to list all codes): 82Changed type of partition 'Linux' to 'Linux swap / Solaris'Command (m for help): wThe partition table has been altered!Calling ioctl() to re-read partition table.WARNING: Re-reading the partition table failed with error 16: Device or resource busy.The kernel still uses the old table. The new table will be used atthe next reboot or after you run partprobe(8) or kpartx(8)Syncing disks.[root@server0 ~]# partprobe [root@server0 ~]# mkswap /dev/vdb2Setting up swapspace version 1, size = 524284 KiBno label, UUID=b9a7e4a8-66f9-4de0-8d3e-f09a7844fa69[root@server0 ~]# swapon -av /dev/vdb2 swapon /dev/vdb2swapon: /dev/vdb2: found swap signature: version 1, page-size 4, same byte orderswapon: /dev/vdb2: pagesize=4096, swapsize=536870912, devsize=536870912[root@server0 ~]# echo "UUID=b9a7e4a8-66f9-4de0-8d3e-f09a7844fa69 swap swap defults 0 0">>/etc/fstab[root@server0 ~]# mount -av/                        : ignored/mnt/lvm                 : already mountedswap                     : ignored

[root@server0 ~]# free -lh | grep Swap Swap: 511M 0B 511M [root@server0 ~]#

十六、查找文件 请把系统上拥有者为jay用户的所有文件，拷贝到/root/findfiles目录中

解题：

[root@server0 ~]# mkdir /root/findfiles -p[root@server0 ~]# find / -user jay -exec cp -a {} /root/findfiles/ \; find: ‘/proc/18294/task/18294/fd/6’: No such file or directoryfind: ‘/proc/18294/task/18294/fdinfo/6’: No such file or directoryfind: ‘/proc/18294/fd/6’: No such file or directoryfind: ‘/proc/18294/fdinfo/6’: No such file or directoryfind: ‘/home/guests/ldapuser0’: Permission deniedcp: cannot overwrite non-directory ‘/root/findfiles/jay’ with directory ‘/home/jay’[root@server0 ~]# ls -l /root/findfiles/total 8drwxr-xr-x. 2 jay jay     6 Jan 27  2014 extensions-rw-r--r--. 1 jay jay     4 Jul 11  2014 gnome-initial-setup-done-rw-rw----. 1 jay mail    0 Dec  4 01:07 jay-rw-r--r--. 1 jay jay  1443 Jul 11  2014 monitors.xmldrwxr-xr-x. 2 jay jay     6 Jan 27  2014 plugins[root@server0 ~]# 

十七、查找一个字符串

• 把/usr/share/dict/words文件中包含seismic字符串的行找到，并将这些行按照原始文件中的顺序存放到/root/wordlist中。• /root/wordlist文件不能包含空行。

解题：

[root@server0 ~]# grep seismic /usr/share/dict/words | grep -v ^$ >/root/wordlist