Powering The Shell

/ chroot /host cd /usr/bin/toolbox 3. Then run the commands like tcpdump or telnet. Continue reading

After application deployments, Kibana stopped showing logs exactly after 7 days. The error “Fluentd error: Unable to push logs to [elasticsearch]” was shown in the fluentd logs. The initial response was to increase the buffer limits for fluentd as follows: chunk_limit_size 10M queue_limit_length 256 The behavior occurred again after two weeks, which led to the Continue reading

Steps for customizing cloud images for linux using guestfish: 1. Install guestfish yum install guestfish 2. Run the guestfish command on the image you want to customize. guestfish –rw -a 3. Type run in the next prompt and press Enter. >run 100% ⟦▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒▒⟧ –:– 4. Type list-filesystems in the prompt to see the filesystems in Continue reading

In a federated environment, an Office 365 user was unable to book meeting in room which was on-premise. After tracing the messages created for booking the room, it was confirmed that the message indeed reached but the room was rejecting it for some reason. The room was rejecting the meeting request as it was considering Continue reading

Here is the first Nutanix Calm blueprint which creates a Linux VM and installs Nginx using a Chef role. 1. First we need to upload the RedHat qcow image into the Nutanix PC image repository.  2. Create a blueprint. 3. Select the cloud. Here we have the options: Nutanix, VMware, AWS and GCP. Nutanix is Continue reading

For on-boarding linux servers to Azure log analytics, just execute the command on the respective server: wget https://raw.githubusercontent.com/Microsoft/OMS-Agent-for-Linux/master/installer/scripts/onboard_agent.sh && sh onboard_agent.sh -p [protocol://][user:password@]proxyhost[:port] -w -s In few cases like mine, the servers will not have access to internet and we will need to install the downloaded oms agent package with the proxy information.  sh omsagent-1.6.0-42.universal.x64.sh Continue reading

Recently we experienced an outage with third party services like Oracle cloud and Service-Now which were integrated with ADFS. ADFS creates a new signing certificate and makes it primary 20 days and 15 days respectively before the expiry of the current certificate. After this, the 3rd party services are unable to communicate with ADFS for Continue reading

1. Create the certificate request as below:  a. Create request.inf with the following configuration:   [NewRequest]   Subject=”CN=”   Exportable=TRUE   KeyLength=1024   KeySpec=1   KeyUsage=0xf0   MachineKeySet=TRUE   [EnhancedKeyUsageExtension]   OID=1.3.6.1.5.5.7.3.1   OID=1.3.6.1.5.5.7.3.2  b. Run the following command to create the request from the request.inf created above:       certreq -new -f RequestConfig.inf Continue reading

1. Reboot to GRUB and press ‘e’ after highlighting the boot-up entry. 2. Scroll to the line starting with ‘linux16’ and enter the following at the end of the same line:     rd.break console=tty1 3. Press Ctrl + x to boot with options specified in step 2. 4. The bootup will lead to a single Continue reading

1. Verify the following packages are available in the linux system:       a. cifs-utils     b. keyutils 2. The following lines need to be added to the end of the /etc/request-key.conf file:     create cifs.spnego * * /usr/sbin/cifs.upcall %k     create dns_resolver * * /usr/sbin/cifs.upcall %k 3. Mount the DFS-R folder   Continue reading