Linux/Basic-Linux-commands at main · BecomeDevops/Linux · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
How to create files  in linux
-----------------------------------

touch one.txt

Different ways to create files
-------------------------------
1) touch one.txt


 2) cat <<EOF>> file3
   I'm from file3
  EOF

---------------------------------
To view the contents of file

cat  becomedevops.txt

----------------------------------
To copy the contents of files

cp firstfile.txt firstfile_bkup.txt
-----------------------------------

To rename thefiles

mv firstfile.txt file1.txt
-------------------------------------
To Delete the files

rm firstfile.txt

-------------------------------------


Types of editors
------------------

vi
vim
nano


Using a Vi Editor
-----------------------------
vi firstfile.txt


To add any content in the file
Enter  i ---> Insert Mode

add any text

To save


ESC

shift+: wq!
-------------------------------------------

To create Directory
------------------
mkdir aws

  ---> To get in to a particular directory use cd command

       ex: cd aws

To create directories recursively
---------------------------------

mkdir -p aws/ec2/userdata


To get back to the previous directory
------------------------------------
 cd ..

To know the current directory
-------------------------------------
pwd


--------------------------------------

To Delete directories

rmdir aws
-------------------------------------
To see the list of heirarchies of files and  drectories visually
Install tree utility

apt install tree

tree

ex: tree aws
aws is a directory
----------------------------------
 you want to clean empty directories, find command can make the job easy:

$ find . -type d -empty -exec rmdir -v {} +

The -type d option searches for directories, -empty select empty ones and -exec rmdir {} executes the rmdir command to delete them.

The rmdir command ensures that the directory is empty before deleting it.

Alternatively, you can also use this command to complete the same task:

$ find . -type d -empty -delete