dmesg kudzu lsmod lspci lsusb Linux Device Management
/var/log/massages is the main kernel log Jul 7 14:20:59 NX102 kernel: iscsi: registered transport (be2iscsi) Jul 7 14:20:59 NX102 kernel: ADDRCONF(NETDEV_UP): eth0: link is not ready Jul 7 14:20:59 NX102 kernel: 8021q: adding VLAN 0 to HW filter on device eth0 Jul 7 14:20:59 NX102 kernel: e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control Jul 7 14:20:59 NX102 kernel: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready Jul 7 14:20:59 NX102 kernel: scsi1 : iSCSI Initiator over TCP/IP Linux Massages log
1.Go to run level 3 2.Find your current run level 3.set your default init to 3 4.reboot and enter single mode, then change the run level back to 5. 5.Open a firefox browser, find the browser PID and kill it gently. 6.find all the services set to run in run level 5 7.set the cups server to start at all relevant levels 8.set the linux firewall not to start at all run levels Exercise
9.create a new title in the boot loader and call it Linux-Your-Name 10. Set this to be the default title. 11. Set the boot loader count down to 10 seconds 12. Add a new Virtual Hard Drive (1GB) to the VirtualBox Linux guest. 13. Reboot and check with dmesg to locate this new disk. 14.Create a cron job that will run every day at 12:30 past midnight (AM) and will look for files with 777 perm and save a list of the files under /tmp Exercise
15. Create a list of all linux usb and pci devices. 16. issue the lsmod mode and examine the output, do you see the Bluetooth driver loaded ? 17. what is this file ? # /etc/sysconfig/hwconf 18. Can you manually run kudzu ? 19. How many processes are currently running ? 20. Open 6 firefox browsers. can you kill them all In one single command ? 21. How can you count the linux cpu cores in one command ?