System Variable | Meaning |
| BASH=/bin/bash | Our shell name |
| BASH_VERSION=1.14.7(1) | Our shell version name |
| COLUMNS=80 | No. of columns for our screen |
| HOME=/home/vivek | Our home directory |
| LINES=25 | No. of columns for our screen |
| LOGNAME=students | students Our logging name |
| OSTYPE=Linux | Our Os type |
| PATH=/usr/bin:/sbin:/bin:/usr/sbin | Our path settings |
| PS1=[\u@\h \W]\$ | Our prompt settings |
| PWD=/home/students/Common | Our current working directory |
| SHELL=/bin/bash | Our shell name |
| USERNAME=vivek | User name who is currently login to this PC |
You can print any of the above variables contains as follows:
$ echo $USERNAME
