How to file creation and update in Linux command
Sudo su : Super user do switch user
Initial Step
Cat : create a file (> ‘overriding the data’)
[override: if delete existing data if will add new data.]
Cat > filename
Enter content
ctrl + d
1.1 (>> ‘appending the data’)
cat >> filename
Enter content
ctrl + d
Display the data of file
cat filename
Touch (create only empty file)
touch filename
Multiple files create
touch <filename1> <filename2> <filename3>
Nano (2nd method for file creation)
nano filename
enter content
ctrl + x
confirmation (Y- yes)
vi/vim ( 3rd method of file creation)
vi filename
i
esc: wq
i – insert mode
w- save, q- quit
Note:
Above 4 cmd is “primary operation”
Nano & vi/vim – Editors(add,delete, append, edit)
Cat – [add,override,append] [readonly purpose] [can’t edit][]
Append: already existing data and add another data as well.
Override: deleting existing one and adding one.
Clear screen
clear
(or)
Ctrl+l