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
[root@localhost ~]# type ls
ls 是 `ls --color=auto' 的别名
[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 已被哈希 (/usr/bin/du)
3、请在/下创建目录abc
[root@localhost ~]# mkdir -pv /abc
mkdir: 已创建目录 "/abc"
[root@localhost ~]#
请在/下创建目录/liangjian/liyunlong/weiheshang/duanpeng
[root@localhost ~]# mkdir -pv /liangjian/liyunlong/weiheshang/duanpeng
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/duanpeng"
请在/abc下一次创建1000个目录,名字自己拟定。
[root@localhost abc]# mkdir -pv lxh{1..1000}
[root@localhost abc]# ls
lxh1 lxh138 lxh178 lxh217 lxh257 lxh297 lxh336 lxh376 lxh415 lxh455 lxh495 lxh534 lxh574 lxh613 lxh653 lxh693 lxh732 lxh772 lxh811 lxh851
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 abc]# cd /liangjian/liyunlong/weiheshang/duanpeng
[root@localhost duanpeng]# pwd
/liangjian/liyunlong/weiheshang/duanpeng
[root@localhost duanpeng]# cd ../..
[root@localhost liyunlong]# pwd
/liangjian/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 *
[root@localhost abc]# ls
[root@localhost abc]#
[root@localhost abc]# touch stu{1..20}.txt
[root@localhost abc]# ls
stu10.txt stu12.txt stu14.txt stu16.txt stu18.txt stu1.txt stu2.txt stu4.txt stu6.txt stu8.txt
stu11.txt stu13.txt stu15.txt stu17.txt stu19.txt stu20.txt stu3.txt stu5.txt stu7.txt stu9.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 ~]# cp /boot/vmlinuz* /abc
[root@localhost ~]# ls /abc
stu10.txt stu12.txt stu14.txt stu16.txt stu18.txt stu1.txt stu2.txt stu4.txt stu6.txt stu8.txt vmlinuz-0-rescue-3d1fd611a8af42619df7f7839dfa5240
stu11.txt stu13.txt stu15.txt stu17.txt stu19.txt stu20.txt stu3.txt stu5.txt stu7.txt stu9.txt vmlinuz-3.10.0-229.el7.x86_64
[root@localhost ~]# du -h /abc/vmlinuz*
4.8M /abc/vmlinuz-0-rescue-3d1fd611a8af42619df7f7839dfa5240
4.8M /abc/vmlinuz-3.10.0-229.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 ~]# mv /abc/vmlinuz-0-rescue-3d1fd611a8af42619df7f7839dfa5240 /abc/kgc
[root@localhost ~]# ls /abc
kgc stu11.txt stu13.txt stu15.txt stu17.txt stu19.txt stu20.txt stu3.txt stu5.txt stu7.txt stu9.txt
stu10.txt stu12.txt stu14.txt stu16.txt stu18.txt stu1.txt stu2.txt stu4.txt stu6.txt stu8.txt vmlinuz-3.10.0-229.el7.x86_64
[root@localhost ~]# mv /abc/vmlinuz-3.10.0-229.el7.x86_64 /tmp
[root@localhost ~]# ls /tmp
hsperfdata_root ssh-jbqYrmgywUee systemd-private-bZsaKA vmlinuz-3.10.0-229.el7.x86_64 yum.log
ks-script-orrnFo systemd-private-0XwnWN systemd-private-D4pDtE vmware-root yum_save_tx.2019-07-23.09-13.ogrGx4.yumtx
8、查看/tmp/目录下以vmlinuz开头文件的详细状态信息。
[root@localhost ~]# stat /tmp/vmlinuz*
文件:"/tmp/vmlinuz-3.10.0-229.el7.x86_64"
大小:5029136 块:9824 IO 块:4096 普通文件
设备:fd00h/64768d Inode:2944993 硬链接:1
权限:(0755/-rwxr-xr-x) Uid:( 0/ root) Gid:( 0/ root)
环境:unconfined_u:object_r:default_t:s0
最近访问:2019-07-23 17:28:04.388410003 +0800
最近更改:2019-07-23 17:28:07.194424245 +0800
最近改动:2019-07-23 19:02:25.592267350 +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-3.10.0-229.el7.x86_64