Linux学习第一章作业.zxs
linux系统管理第一章作业
上机作业:
1、请用命令查出ifconfig命令程序的绝对路径
[root@localhost ~]# which ifconfig
/usr/sbin/ifconfig
2、请用命令展示以下命令哪些是内部命令，哪些是外部命令?(cd \ pwd \ ls \ ifconfig \ du)
[root@localhost ~]# type cd
cd 是 shell 内嵌 (由此可见该命令cd为内部命令)
[root@localhost ~]# type pwd
pwd 是 shell 内嵌(由此可见该命令pwd为内部命令)
[root@localhost ~]# type ls
ls 是 `ls --color=auto' 的别名 (由此可见该命令ls为外部命令)
[root@localhost ~]# type ifconfig
ifconfig 是 /usr/sbin/ifconfig(由此可见该命令ifconfig为外部命令)
[root@localhost ~]# type du
du 是 /usr/bin/du(由此可见该命令ifconfig为外部命令)
3、请在/下创建目录abc
[root@localhost /]# mkdir abc
[root@localhost /]# ls
abc boot etc lib media opt root sbin sys usr
bin dev home lib64 mnt proc run srv tmp var
请在/下创建目录/liangjian/liyunlong/weiheshang/duanpengcd
root@localhost /]# cd abc
[root@localhost abc]# mkdir -pv /liangjian/liyunlong/weiheshang/duanpengcd
mkdir: 已创建目录 "/liangjian"
mkdir: 已创建目录 "/liangjian/liyunlong"
mkdir: 已创建目录 "/liangjian/liyunlong/weiheshang"
mkdir: 已创建目录 "/liangjian/liyunlong/weiheshang/duanpengcd"
请在/abc下一次创建1000个目录，名字自己拟定
[root@localhost abc]# mkdir {1..1000}{12}
[root@localhost abc]# ls
4、请用绝对路径方式切换到/liangjian/liyunlong/weiheshang/duanpeng 目录下
并用pwd查看当前的路径，请用上级目录名".."方式切换到 /liangjian/liyunlong下
[root@localhost /]# cd /liangjian/liyunlong/weiheshang/duanpengcd
[root@localhost duanpengcd]# pwd
/liangjian/liyunlong/weiheshang/duanpengcd
[root@localhost duanpengcd]#cd ..
[root@localhost weiheshang]# cd ..
[root@localhost liyunlong]#
5、请一次删除/abc下一次创建的1000个目录，请在/abc下用touch再创建20个以stu开头的普通可读文档，文档后缀为.txt
[root@localhost abc]# rm -rf *{12}
[root@localhost abc]# ls
[root@localhost abc]#
[root@localhost abc]# touch stu{1..20}.txt
[root@localhost abc]# ls
stu10.txt stu13.txt stu16.txt stu19.txt stu2.txt stu5.txt stu8.txt
stu11.txt stu14.txt stu17.txt stu1.txt stu3.txt stu6.txt stu9.txt
stu12.txt stu15.txt stu18.txt stu20.txt stu4.txt stu7.txt
6、请用cp命令将/boot/目录下以vmlinuz开头的文件拷贝到/abc下，并以查看他们占磁盘的空间大小。
[root@localhost boot]# cp vmlinuz-* /abc/
[root@localhost boot]# cd /abc
[root@localhost abc]# ls
stu10.txt stu18.txt stu6.txt
stu11.txt stu19.txt stu7.txt
stu12.txt stu1.txt stu8.txt
stu13.txt stu20.txt stu9.txt
stu14.txt stu2.txt vmlinuz-0-rescue-31f765095e1440c19a6355c391d8b37b
stu15.txt stu3.txt vmlinuz-3.10.0-693.el7.x86_64
stu16.txt stu4.txt
stu17.txt stu5.txt
[root@localhost abc]# du -hs vmlinuz-*
5.7M vmlinuz-0-rescue-31f765095e1440c19a6355c391d8b37b
5.7M vmlinuz-3.10.0-693.el7.x86_64
7、将其中一个vmlinuz开头的文件改名为kgc，另外一个剪切到/tmp目录下。
[root@localhost abc]# mv vmlinuz-0-rescue-31f765095e1440c19a6355c391d8b37b kgc
[root@localhost abc]# ls
kgc stu14.txt stu19.txt stu4.txt stu9.txt
stu10.txt stu15.txt stu1.txt stu5.txt vmlinuz-3.10.0-693.el7.x86_64
stu11.txt stu16.txt stu20.txt stu6.txt
stu12.txt stu17.txt stu2.txt stu7.txt
stu13.txt stu18.txt stu3.txt stu8.txt
[root@localhost abc]# mv vmlinuz-3.10.0-693.el7.x86_64 /tmp
[root@localhost abc]# ls /tmp
anaconda.log
hsperfdata_root
ifcfg.log
ks-script-95TaI1
packaging.log
program.log
sensitive-info.log
ssh-4Logf2koCIeh
ssh-FQa1t5Qo4UsR
storage.log
systemd-private-0934a3c225da4868914ecc6b4bcd82d5-chronyd.service-R6Kolm
systemd-private-0934a3c225da4868914ecc6b4bcd82d5-colord.service-BzfhDY
systemd-private-0934a3c225da4868914ecc6b4bcd82d5-cups.service-ViZWqL
systemd-private-0934a3c225da4868914ecc6b4bcd82d5-rtkit-daemon.service-X9xzj0
systemd-private-0934a3c225da4868914ecc6b4bcd82d5-vgauthd.service-cnIl76
systemd-private-0934a3c225da4868914ecc6b4bcd82d5-vmtoolsd.service-2wcrGe
systemd-private-3a9601c16f974e588a53ad9636f64bfb-chronyd.service-2IDYE8
systemd-private-3a9601c16f974e588a53ad9636f64bfb-colord.service-pIx6wA
systemd-private-3a9601c16f974e588a53ad9636f64bfb-cups.service-LRQiaT
systemd-private-3a9601c16f974e588a53ad9636f64bfb-rtkit-daemon.service-V1OqLf
systemd-private-3a9601c16f974e588a53ad9636f64bfb-vgauthd.service-Gn2UWm
systemd-private-3a9601c16f974e588a53ad9636f64bfb-vmtoolsd.service-Bmodgu
tracker-extract-files.0
tracker-extract-files.1000
vmlinuz-3.10.0-693.el7.x86_64
yum.log
yum_save_tx.2019-07-23.19-40.H01igY.yumtx
yum_save_tx.2019-07-24.09-15.KtMn3n.yumtx
8、查看/tmp/目录下以vmlinuz开头文件的详细状态信息。
[root@localhost tmp]# stat /tmp/vmlinuz-3.10.0-693.el7.x86_64
文件："/tmp/vmlinuz-3.10.0-693.el7.x86_64"
大小：5877760 块：11480 IO 块：4096 普通文件
设备：fd00h/64768d Inode：4534555 硬链接：1
权限：(0755/-rwxr-xr-x) Uid：( 0/ root) Gid：( 0/ root)
最近访问：2019-07-23 17:22:31.352435913 +0800
最近更改：2019-07-23 17:27:02.701843250 +0800
最近改动：2019-07-23 17:28:09.402714318 +0800
创建时间：-
9、用find命令查找/tmp目录下以vmlinuz开头及大小超过1M的文件
[root@localhost tmp]# find -name "vmlinuz*" -a -size +1M
./vmlinuz-3.10.0-693.el7.x86_64
