💡
while using octal code like xyz, where x gives permission for the user or owner, y talks about group & z tells about others.
Examples for more clarity:
* Full access for Owner, add read, remove execute for group and no access for others
```bash
[~]$ chmod u+rwx,g+r-x,o-rwx test-file
```
* Provide full access to Owners, group and others
```bash
[~]$ chmod 777 test-file
```
* Provide Read and execute access to Owners,groups and others
```bash
[~]$ chmod 555 test-file
```
* Read and Write access for Owner and Group, No access for others.
```bash
[~]$ chmod 660 test-file
```
* Full access for Owner, read and execute for group and no access for others.
```bash
[~]$ chmod 750 test-file
```
---
* *Checking Command History:* To check which commands you have run till now
```bash
[~]$ history
```
* *Removing a Directory/Folder:* To remove a directory/folder (for example, remove a directory named 'my\_folder')
```bash
[~]$ rm -r my_folder
```
* *Creating and Viewing fruits.txt:*
```bash
[~]$ echo "Apple Mango Banana Cherry Kiwi Orange Guava" > fruits.txt
[~]$ cat fruits.txt
```
* *Adding Content to devops.txt:* Add content in devops.txt (One in each line) - Apple, Mango, Banana, Cherry, Kiwi, Orange, Guava:
```bash
[~]$ echo -e "Apple\nMango\nBanana\nCherry\nKiwi\nOrange\nGuava" > devops.txt
```
* *Showing Top Three Fruits:*
```bash
[~]$ head -n 3 devops.txt
```
* *Showing Bottom Three Fruits*
```bash
[~]$ tail -n 3 devops.txt
```
* *Creating and Viewing Colors.txt*
```bash
[~]$ echo -e "Red\nPink\nWhite\nBlack\nBlue\nOrange\nPurple\nGrey" > Colors.txt
[~]$ cat Colors.txt
```
* *Adding Content to Colors.txt:* Add content in Colors.txt (One in each line) - Red, Pink, White, Black, Blue, Orange, Purple, Grey:
```bash
[~]$ echo -e "Red\nPink\nWhite\nBlack\nBlue\nOrange\nPurple\nGrey" > Colors.txt
```
* *Finding Differences Between Files:* To find the difference between fruits.txt and Colors.txt file
```bash
[~]$ diff fruits.txt Colors.txt
```
> "Choose a job you love, and you will never have to work a day in your life." -