Linux Useful Commands
Contents
Generic
| Command | Example | Description |
| man -f | man -f vim | What is ? |
| man -k | man -k editor | search the manual page names and descriptions |
| apropos | apropos editor | search the manual page names and descriptions |
| uname | uname -a | print system information |
| du | du -cxk | estimate file space usage |
| discover | discover -d | hardware detection utility |
| lspci | lspci -vvv | list all PCI devices |
| tune2fs | tune2fs -l /dev/sda1 | adjust tunable filesystem parameters on ext2/ext3 filesystems |
| debugfs | debugfs -w /dev/sda1 -R 'features ext_attr' | ext2/ext3 file system debugger |
| e2fsck | e2fsck -y -f /dev/sda1 | check a Linux ext2/ext3 file system |
| badblocks | badblocks -v /dev/sda1 | search a device for bad blocks |
| dumpe2fs | dumpe2fs /dev/sda1 | dump ext2/ext3 filesystem information |
| e2image | e2image -r /dev/sda1 sda1_file_info | Save critical ext2/ext3 filesystem metadata to a file |
| hostid | hostid | print the numeric identifier for the current host |
| ethtool | ethtool -i eth0 | Display or change ethernet card settings |
| mii-tool | mii-tool -v eth0 | view, manipulate media-independent interface status |
| mii-diag | mii-diag -v eth0 | Network adapter control and monitoring |
| pkill | pkill firefox | look up or signal processes based on name and other attributes |
| pgrep | [pgrep firefox | look up or signal processes based on name and other attributes |
| pidof | pidof firefox-bin | find the process ID of a running program |
| pgrep | pgrep squid | find ALL the process ID of a running program |
| sysctl | sysctl -a | configure kernel parameters at runtime |
| ipcs | ipcs -s | provide information on ipc facilities |
| ipcrm | ipcrm -s 11111 | remove a message queue, semaphore set or shared memory id |
| pmap | pmap -x 6981 | pmap – report memory map of a process |
| tload | tload -d 1 | tload – graphic representation of system load average |
| slabtop | slabtop | display kernel slab cache information in real time |
| dmidecode | dmidecode | DMI table decoder |
| arp | arp -v | manipulate the system ARP cach |
| findsmb | findsmb | list info about machines that respond to SMB name queries on a subnet |