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Mehar mehar

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@mehar
mehar / k8s_podentrypoint_bash_while_loop.md
Created October 23, 2020 21:50
k8s_podentrypoint_bash_while_loop.md 
apiVersion: v1
kind: Pod
metadata:
  name: ubuntu
spec:
  containers:
  - name: ubuntu
    image: ubuntu:latest
 # Just spin & wait forever
@mehar
mehar / kubectl commands
Created July 27, 2020 16:46
Discover k8s resources
```
kubectl api-resources
```
Fetch resource schemas
```
kubectl explain replicaset --recursive
```
@mehar
mehar / tcpdump.md
Created November 29, 2018 09:56
TCP Dump CheatSheet

Dump http parsed messages

tcpdump -A -vv 'port 8086'
@mehar
mehar / Shell_Scripting_CheatSheet.md
Created October 20, 2018 15:04
Shell Scripting Cheat Sheet 
FOO=${VARIABLE:-default}  # If variable not set or null, use default.
FOO=${VARIABLE:=default}  # If variable not set or null, set it to default.
@mehar
mehar / sed_awk.md
Last active June 8, 2018 15:42 
sed 's/,/,\n/g' bigdata2.txt > bigdata2_formatted.txt
cat bigdata2_formatted.txt | grep label | awk -F ":" '{print $2}' | sort | uniq -c
@mehar
mehar / git_and_github_cheatsheet.md
Last active June 2, 2018 07:15
Git/GitHub CheatSheet

Useful Default Configurations

# git push by default pushes all matching branches upstream, options simple will just push the current branch
git config --global push.default simple
# git pull by default do a fetch and merge, introduces a merge commit, instead use a 'git pull --rebase' as default
git config --global pull.rebase true
# Configure ReReRe (Reuse Recorded Resolution)
git config --global rerere.enabled true
@mehar
mehar / BashCommandCheatSheet.sh
Last active May 13, 2018 13:56
Bash Command CheatSheet
# Single Quote ('') vs Double Quote("")
Enclosing characters in single quotes (‘'’) preserves the literal value of each character within the quotes. A single quote may not occur between single quotes, even when preceded by a backslash.
[https://www.gnu.org/software/bash/manual/html_node/Double-Quotes.html#Double-Quotes]
# Sort directories by size and print
du -h --max-depth=1 | sort -hr
# Setup ssh key based access
ssh-copy-id user@host
@mehar
mehar / JavaNotes.md
Last active March 22, 2018 11:52
Java Notes

Print JVM defaults

java -XX:+PrintFlagsFinal

Print System Properties

jcmd process_id VM.system_properties

Print JVM tuning flags




  


  




    


          
    

      

        
        

          

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                mehar
                / flinkSummary.js
            
            

              Created
              January 16, 2018 14:11
            

              
                Flink Summary Script
              
          

        

      

        

  

    
    


        



  


  

        

          
          /**
        

        

          
          Instructions:
        

        

          
              1) Open flink console
        

        

          
              2) Open javascript console in the browser
        

        

          
              3) Paste this script
        

        

          
              4) When required call flinkSummary()
        

        

          
          **/
        

        

          
          

        

        

          
          // Import axios javascript
        

        

          
          if (!document.getElementById("axios_script_id")) {
        

  





    


  




    


          
    

      

        
        

          

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                mehar
                / .tmux.conf
            
            

              Last active
              December 16, 2017 11:35
            

              
                TMux2 Configuration, reference: https://www.safaribooksonline.com/library/view/tmux-2/9781680502374/
              
          

        

      

        

  

    
    


        



  


  

        

          
          # Set the base index for windows to 1 instead of 0
        

        

          
          set -g base-index 1
        

        

          
          

        

        

          
          # Set the base index for panesl to 1 instead of 0
        

        

          
          setw -g pane-base-index 1
        

        

          
          

        

        

          
          # Reload tmx configuration
        

        

          
          bind r source-file ~/.tmux.conf \; display "Reloaded ~/.tmux.conf!"
        

        

          
          

        

        

          
          # Ensure we can send Ctrl+b to other apps