How to ping multiple hosts.

[root@sukhoi tmp]# cat pingall.sh #!/bin/bash # Script to check the ping to multiple nodes # Version 1.1 # date 29-10-2024 date cat /tmp/nodes.txt | while read output do ping -c 1 "$output" > /dev/null if [ $? -eq 0 ]; then echo "node $output is up" else echo "node $output is down" fi done

How to set the boot manager in exadata Linux

[root@sukhoi~]# efibootmgr -v BootCurrent: 0009 Timeout: 1 seconds BootOrder: 0000,0001,0002,0003,0006,0007 Boot0000* ExadataLinux_1 HD(2,GPT,147745f1-4f73-42b2-bc34-f64dfc876d29,0x100040,0x80000)/File(\EFI\redhat\shimx64.efi) Boot0001* NET0:PXE IP4 Intel(R) I210 Gigabit Network Connection PciRoot(0x0)/Pci(0x1c,0x4)/Pci(0x0,0x0)/MAC-ADDRESS,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO Boot0002* NET1:PXE IP4 Oracle Dual Port 10Gb/25Gb SFP28 Ethernet Controller PciRoot(0x1)/Pci(0x0,0x0)/Pci(0x0,0x0)/MAC(MAC-ADDRESS,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO Boot0003* NET2:PXE IP4 Oracle Dual Port 10Gb/25Gb SFP28 Ethernet Controller PciRoot(0x1)/Pci(0x0,0x0)/Pci(0x0,0x1)/MAC( MAC-ADDRESS,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO Boot0006* PCIE1:PXE IP4 Nvidia Network Adapter - B8:CE:F6:23:15:9A PciRoot(0x8)/Pci(0x0,0x0)/Pci(0x0,0x0)/MAC(MAC-ADDRESS,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO Boot0007* PCIE1:PXE IP4 Nvidia Network Adapter - B8:CE:F6:23:15:9B PciRoot(0x8)/Pci(0x0,0x0)/Pci(0x0,0x1)/MAC(MAC-ADDRESS,1)/IPv4(0.0.0.00.0.0.0,0,0)..BO MirroredPercentageAbove4G: 0.00 MirrorMemoryBelow4GB: false [root@sukhoi~]# efibootmgr -n 0000 BootNext: 0000 BootCurrent: 0009 Timeout: 1 seconds BootOrder: 0000,0001,0002,0003,0006,0007 Boot0000* ExadataLinux_1 Boot0001* NET0:PXE IP4 Intel(R) I210 Gigabit Network Connection Boot0002* NET1:PXE IP4 Oracle Dual Port 10Gb/25Gb SFP28 Ethernet Controller Boot0003* NET2:PXE IP4 Oracle Dual Port 10Gb/25Gb SFP28 Ethernet Controller Boot0006* PCIE1:PXE IP4 Nvidia Network Adapter - MAC-ADDRESS Boot0007* PCIE1:PXE IP4 Nvidia Network Adapter - MAC-ADDRESS MirroredPercentageAbove4G: 0.00 MirrorMemoryBelow4GB: false

How to update the firmware in Exadata

/opt/oracle.cellos/CheckHWnFWProfile -U /opt/oracle.cellos/iso/cellbits cellcli -e alter cell shutdown services all on the cell service /opt/oracle.cellos/CheckHWnFWProfile -action updatefw -component HardDisk -powercycle no (To update the disk firmware) /opt/oracle.cellos/CheckHWnFWProfile -action updatefw -component InfinibandHCA (To update the InfinibandHCA Firmware) /opt/oracle.cellos/CheckHWnFWProfile -action updatefw -component all (To update all the component)

How to check the Apache is Working through ansible

--- - name: Check if Apache is Working hosts: webservers vars: webserver_message: "I am running to the finish line." tasks: - name: Start httpd service: name: httpd state: started - name: Create index.html using Jinja2 template: src: index.j2 dest: /var/www/html/index.html

Create node-reboot.yml

--- - hosts: become: yes tasks: - name: Check the uptime shell: uptime register: UPTIME_PRE_REBOOT - debug: msg={{UPTIME_PRE_REBOOT.stdout}} - name: Check the kernel info before the reboot shell: uname -a register: Kernel_PRE_REBOOT - debug: msg={{Kernel_PRE_REBOOT.stdout}} - name: Unconditionally reboot the machine with all defaults reboot: reboot_timeout: 600 - name: Check the uptime after reboot shell: uptime register: UPTIME_POST_REBOOT - debug: msg={{UPTIME_POST_REBOOT.stdout}} - name: Check the kernel info after the reboot shell: uptrack-uname -a register: Kernel_POST_REBOOT - debug: msg={{Kernel_POST_REBOOT.stdout}}

How to check the disk info speed and unreadable blocks

# Show info about disk sda hdparm -i /dev/sda # Perform a read speed test on disk sda hdparm -tT /dev/sda # Test for unreadable blocks on disk sda badblocks -s /dev/sda

How to check the smart on all the drives

for disk in `ls -1 /dev/sd*`; do smartctl -a $disk; done

How to unzip multiple files in Linux

for I in `ls p24436624_121020_Linux-x86-64*f10.zip` do unzip $I done

How to set the time in the aruba switch and sync with the ntp.

login to the Switch configure terminal clock set 05/27/2024 03:04:30 timesync ntp ntp enable show ntp status write memory.

How to kill the process which is hogging the CPU

ps auwx | grep process | awk {'print $2'} | xargs kill -9