| 601 | | '''who am i''': |
| 602 | | '''df -dh''': |
| 603 | | '''man''': |
| 604 | | '''date''': |
| 605 | | '''time''': |
| 606 | | '''ln''': |
| 607 | | '''ps''': |
| 608 | | '''kill''': |
| | 601 | - '''who''': who command will give you information about who is logged on the system. |
| | 602 | {{{ |
| | 603 | $ who |
| | 604 | root pts/0 2014-10-10 23:07 (10.104.33.101) |
| | 605 | paul pts/1 2014-10-10 23:30 (10.104.33.101) |
| | 606 | laura pts/2 2014-10-10 23:34 (10.104.33.96) |
| | 607 | }}} |
| | 608 | * '''whoami''' command tells you your username |
| | 609 | {{{ |
| | 610 | $ whoami |
| | 611 | paul |
| | 612 | }}} |
| | 613 | |
| | 614 | - '''df -dh''': report file system disk space usage |
| | 615 | {{{ |
| | 616 | $ df -h |
| | 617 | Filesystem Size Used Avail Use% Mounted on |
| | 618 | /dev/sda1 451G 141G 287G 33% / |
| | 619 | udev 10M 0 10M 0% /dev |
| | 620 | tmpfs 774M 19M 755M 3% /run |
| | 621 | .. |
| | 622 | .. |
| | 623 | }}} |
| | 624 | |
| | 625 | - '''man''': Will give you man pages (also called manual pages) on your Unix or Linux computer |
| | 626 | {{{ |
| | 627 | $man ls |
| | 628 | $man cp |
| | 629 | }}} |
| | 630 | - '''date''': Will give you the date and time of the system |
| | 631 | {{{ |
| | 632 | $ date |
| | 633 | Thu Nov 17 16:01:52 IST 2016 |
| | 634 | }}} |
| | 635 | - '''ln''': Use to create links between files. Frequently use with '''-s''' to create symbolic links |
| | 636 | {{{ |
| | 637 | $ ln -s file2 symlink_to_file2 |
| | 638 | }}} |
| | 639 | - '''ps''': report a snapshot of the current processes. frequently use with -aux. |
| | 640 | {{{ |
| | 641 | $ ps -aux |
| | 642 | USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND |
| | 643 | root 1 0.0 0.0 111476 3400 ? Ss 07:39 0:01 /sbin/init |
| | 644 | root 2 0.0 0.0 0 0 ? S 07:39 0:00 [kthreadd] |
| | 645 | root 3 0.3 0.0 0 0 ? S 07:39 1:40 [ksoftirqd/0] |
| | 646 | }}} |