day4

linux快捷键

ctrl+c 取消当前运行的操作
ctrl+l 清屏
ctrl+a 将光标移动到行首
ctrl+e 将光标移动到行尾
ctrl+u 剪切光标到行首的内容
ctrl+y 粘贴

cd 和 pwd

[root@oldboyedu59 ~]# pwd
/root

[root@oldboyedu59 ~]# cd  /tmp/
[root@oldboyedu59 tmp]# pwd
/tmp

[root@oldboyedu59 tmp]# cd  /etc/sysconfig/network-scripts/
[root@oldboyedu59 network-scripts]# pwd
/etc/sysconfig/network-scripts

~ 当前用户家目录

[root@oldboyedu59 network-scripts]# cd ~
[root@oldboyedu59 ~]# pwd
/root

cd ~ === cd
cd .. 进入当前目录的上一级目录
cd . 进入当前目录

[root@oldboyedu59 etc]# cd  /etc/sysconfig/network-scripts/
[root@oldboyedu59 network-scripts]# cd /tmp/
[root@oldboyedu59 tmp]# cd  -/etc/sysconfig/network-scripts

.lck #lock
删除xxxxx.lck目录

[root@oldboyedu59 ~]# mkdir  /oldboy
[root@oldboyedu59 ~]# ls /oldboy/
[root@oldboyedu59 ~]# ls -l  /oldboy/
total 0

pwd cd mkdir ls 练习题: 根据描述进行操作(发出操作过程)
创建/data 和 /你的名字 (拼音的目录)
进入到/data目录,然后再进入 /你名字的目录
进入到上一次所在目录
回老家

[root@oldboyedu59 ~]# mkdir   /data/   /lidao  
[root@oldboyedu59 ~]# ls -l /data   /lidao/
/data:
total 0

/lidao/:
total 0
[root@oldboyedu59 ~]# cd /data/
[root@oldboyedu59 data]# cd /lidao/
[root@oldboyedu59 lidao]# cd -
/data
[root@oldboyedu59 data]# cd

路径:
一切从根开始
绝对路径: 从根开始的路径 √
/data
/oldboy
/etc/sysconfig/network-scripts

相对路径: 不是从根开始的路径
data
oldboy

[root@oldboyedu59 ~]# mkdir  /data/oldboy/lidao/a/b/c/d/e
mkdir: cannot create directory ‘/data/oldboy/lidao/a/b/c/d/e’: No such file or directory

mkdir 命令默认只能创建1层目录创建多层报错

[root@oldboyedu59 ~]# mkdir  /data/oldboy/lidao/a/b/c/d/e
mkdir: cannot create directory ‘/data/oldboy/lidao/a/b/c/d/e’: No such file or directory
[root@oldboyedu59 ~]# mkdir -p  /data/oldboy/lidao/a/b/c/d/e
[root@oldboyedu59 ~]# ls -l  /data/oldboy/lidao/a/b/c/d/e/
total 0
[root@oldboyedu59 ~]# touch /oldboy/oldboy.txt
[root@oldboyedu59 ~]# ls -l /oldboy/
total 0
-rw-r--r--. 1 root root 0 Mar 28 11:46 oldboy.txt

mkdir与touch题目:

创建 /oldboy/alex/lidao 和 /data/alex/lidao 两个目录

在/oldboy/alex/lidao 和 /data/alex/lidao 都创建一个叫oldboy.txt文件

[root@oldboyedu59 ~]# mkdir -p   /oldboy/alex/lidao   /data/alex/lidao 
[root@oldboyedu59 ~]# touch /oldboy/alex/lidao/oldboy.txt  /data/alex/lidao/oldboy.txt
[root@oldboyedu59 ~]# ls -l  /oldboy/alex/lidao/    /data/alex/lidao/
/data/alex/lidao/:
total 0
-rw-r--r--. 1 root root 0 Mar 28 11:58 oldboy.txt

/oldboy/alex/lidao/:
total 0
-rw-r--r--. 1 root root 0 Mar 28 11:58 oldboy.txt

echo {} 生成序列

[root@oldboyedu59 ~]# echo  oldboy
oldboy
[root@oldboyedu59 ~]# echo {1..10}
1 2 3 4 5 6 7 8 9 10
[root@oldboyedu59 ~]# echo  {a..z}
a b c d e f g h i j k l m n o p q r s t u v w x y z
[root@oldboyedu59 ~]# echo oldboy{1..10}
oldboy1 oldboy2 oldboy3 oldboy4 oldboy5 oldboy6 oldboy7 oldboy8 oldboy9 oldboy10

特殊:

[root@oldboyedu59 ~]# echo {01..10}
01 02 03 04 05 06 07 08 09 10

显示出 oldboy01.txt oldboy02.txt oldboy03.txt ..... oldboy10.txt

[root@oldboyedu59 ~]# echo oldboy{01..10}.txt
oldboy01.txt oldboy02.txt oldboy03.txt oldboy04.txt oldboy05.txt oldboy06.txt oldboy07.txt oldboy08.txt oldboy09.txt oldboy10.txt
[root@oldboyedu59 ~]# touch  oldboy{01..10}.txt
[root@oldboyedu59 ~]# touch  oldboy{01..10}.txt
[root@oldboyedu59 ~]# ls -l
total 16
-rw-------. 1 root root  1341 Mar 26 11:46 anaconda-ks.cfg
-rw-r--r--. 1 root root 10213 Mar 28 10:28 grep.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy01.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy02.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy03.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy04.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy05.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy06.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy07.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy08.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy09.txt
-rw-r--r--. 1 root root     0 Mar 28 12:16 oldboy10.txt
drwxr-xr-x. 2 root root     6 Mar 27 20:31 oldgirl
drwxr-xr-x. 2 root root     6 Mar 27 20:33 oldman

[root@oldboyedu59 ~]# cp  /oldboy/oldboy.txt   /tmp/
[root@oldboyedu59 ~]# cp /oldboy   /tmp/
cp: omitting directory ‘/oldboy’

[root@oldboyedu59 ~]# cp -r /oldboy/ /tmp/
[root@oldboyedu59 ~]# ls -l /tmp/
total 4
-rwx------. 1 root root 836 Mar 26 11:46 ks-script-pzO18O
drwxr-xr-x. 3 root root  36 Mar 28 12:32 oldboy
drwxr-xr-x. 2 root root   6 Mar 27 20:30 oldboy59
-rw-r--r--. 1 root root   0 Mar 28 12:24 oldboy.txt
drwx------. 2 root root   6 Mar 26 11:56 vmware-root_6737-3853947227
drwx------. 2 root root   6 Mar 27 08:37 vmware-root_6762-2864843553
-rw-------. 1 root root   0 Mar 26 11:37 yum.log

[root@oldboyedu59 ~]# ls -l /oldboy/oldboy.txt 
-rw-r--r--. 1 root root 0 Mar 28 11:47 /oldboy/oldboy.txt
[root@oldboyedu59 ~]# cp  /oldboy/oldboy.txt  /oldboy/oldboy.txt.bak 
[root@oldboyedu59 ~]# ls -l /oldboy/
total 0
drwxr-xr-x. 3 root root 19 Mar 28 11:57 alex
-rw-r--r--. 1 root root  0 Mar 28 11:47 oldboy.txt
-rw-r--r--. 1 root root  0 Mar 28 12:38 oldboy.txt.bak

课堂笔记day4-59期