Ubuntu FUC – Frequently Used Commands

To know the path of the binary being used:
```
which binary-name
```
To know recently modified file in a directory:
```
ls -lrt
```
To know the list of disks on the system:
```
sudo fdisk -l
```
To know the application is available for installation from source list:
```
sudo dpkg -s application-name
```
To install an application :
```
sudo apt-get install application-name
```
To install an application without request for confirmation:
```
sudo apt-get -y install application-name
```
To download a file from WebLink:
```
wget weblink
```
To extract a tar or gz file and also display details of extraction:
```
tar xvf tarfilename
```
To create a tar file and also display details of creation:
```
tar cvf tarfilename directorynamesdelimitedbyspace
```
To modify permissions(Read-4, Write-2, Execute-1. First value in below command is for Owner, Second is for Group and Third is for Others ) for a file:
```
chmod 777 filename
```
To modify permissions for a Directory:
```
chmod -R 777 directoryname
```
To modify ownership of a File:
```
chown user-name filename
```
To modify ownership for a Directory:
```
chown -R user-name directoryname
```
To modify Group of a File:
```
chgrp group-name filename
```
To modify Group for a Directory:
```
chgrp -R group-name directoryname
```
To modify Owner & Group of a File:
```
chown user-name:group-name filename
```

To modify Owner & Group for a Directory:

chown -R user-name:group-name directoryname

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