useful linux utilities

.bash.rcext

function topnfiles {
  # show top n files by size
  # Usage: $ topnfiles <dir> <n>
  # https://www.cyberciti.biz/faq/how-do-i-find-the-largest-filesdirectories-on-a-linuxunixbsd-filesystem/
  du -hsx ${1:-.}/* | sort -rh | head -${2:-10}
}

# show home dir size, available space
alias hdf='df -h | grep home'

# kubernetes utilities
function podlog() {
   # get podlog from partial podname
   # Usage: podlog <partial podname>
   pod=`kubectl get pods --all-namespaces | grep "$1" | tr -s ' ' | cut -d ' ' -f 2 | head -n1`
   ns=`kubectl get pods --all-namespaces | grep "$1" | tr -s ' ' | cut -d ' ' -f 1 | head -n1`
   shift 1
   kubectl logs --namespace $ns $pod $*
}

function despod() {   
  # describe pod from partial podname
  # Usage: despod <partial podname>
  kubectl get pods -o name | grep $1 | cut -d / -f 2 | head -n1 | xargs -L1 -I{} kubectl describe pod {} | less
}

function podssh() {
  # ssh into a pod from partial podname
  # Usage: podssh <partial podname> <cmd|bash>
  pod=`kubectl get pods --all-namespaces | grep -E "\s$1.*" | grep -i "running" | tr -s ' ' | cut -d ' ' -f 2 | head -n1`
  ns=`kubectl get pods --all-namespaces | grep -E "\s$1.*" | grep -i "running" | tr -s ' ' | cut -d ' ' -f 1 | head -n1`
  shift 1
  cmd=${@:-bash}
  kubectl exec -it --namespace $ns $pod  -- $cmd
}

function pods() {
  # get list of pods
  kubectl get pods $*
}

function svcs {
  # get list of services
  kubectl get services
}