Suggestion: Keep headings when sorted

[Mattias Johansson]

Hello,

I often find that I want to keep one or a few lines untouched by sort, and end 
up using something like this:

$ awk 'NR == 1; NR > 1 { print $0 | "sort" }'


It would be handy if sort had an option for 'number of heading lines' or 
similar!

I imagine something like this:

$ sort -H  # keeps first line in place while sorting the rest

Or maybe keep it generic:

$ sort -H 3  # keeps first 3 lines in place while sorting the rest


Concrete use case:

$ kubectl get pod -A -o wide | awk 'NR == 1; NR > 1 { print $0 | "sort -k 7" }'
NAMESPACE    NAME                                                 READY  STATUS 
  RESTARTS  AGE  IP         NODE                                 NOMINATED  
NODE    READINESS  GATES
foo          foo-gui-7bc9944686-5q6wr                             1/1    
Running  0         40m  10.0.0.13  aks-private-30529318-vmss000000      <none>  
   <none>
bar          bar-internal-ws-f7c95c569-zzxrz                      1/1    
Running  0         40m  10.0.0.14  aks-private-30529318-vmss000000      <none>  
   <none>
foo          foo-psql-7d7ff9b7b8-4gw9k                            1/1    
Running  1         40m  10.0.0.15  aks-private-30529318-vmss000000      <none>  
   <none>
baz          baz-internal-ws-7c8dd8875b-b8nsk                     1/1    
Running  0         40m  10.0.0.19  aks-private-30529318-vmss000000      <none>  
   <none>
foo          foo-admin-67fc4fcfc4-8z8l9                           1/1    
Running  0         40m  10.0.0.23  aks-private-30529318-vmss000000      <none>  
   <none>
baz          baz-psql-56fb65b5cd-c5d5l                            1/1    
Running  1         40m  10.0.0.32  aks-private-30529318-vmss000000      <none>  
   <none>
bar          bar-psql-5cb8fd99b-mljq2                             1/1    
Running  1         40m  10.0.0.33  aks-private-30529318-vmss000000      <none>  
   <none>
kube-system  calico-node-6ll4z                                    1/1    
Running  0         17h  10.0.0.4   aks-private-30529318-vmss000000      <none>  
   <none>
kube-system  kube-proxy-wwc87                                     1/1    
Running  0         16h  10.0.0.4   aks-private-30529318-vmss000000      <none>  
   <none>
foo          foo-internal-ws-86498bb864-pvrl2                     1/1    
Running  0         40m  10.0.0.7   aks-private-30529318-vmss000000      <none>  
   <none>
qux          qux-psql-5d66ff54f6-fpwj7                            1/1    
Running  1         40m  10.1.0.14  aks-veryprivate-30529318-vmss000000  <none>  
   <none>
quux         quux-universal-ws-5d88c9967b-7km4n                   1/1    
Running  0         40m  10.1.0.17  aks-veryprivate-30529318-vmss000000  <none>  
   <none>
quux         spec-universal-ws-5b4c49f98d-48bb7                   1/1    
Running  0         40m  10.1.0.20  aks-veryprivate-30529318-vmss000000  <none>  
   <none>
quux         quux-psql-86567f96d8-nx2xl                           1/1    
Running  1         40m  10.1.0.23  aks-veryprivate-30529318-vmss000000  <none>  
   <none>
qux          qux-internal-ws-c48868467-mvhkc                      1/1    
Running  0         40m  10.1.0.30  aks-veryprivate-30529318-vmss000000  <none>  
   <none>
kube-system  calico-node-l4kfm                                    1/1    
Running  0         17h  10.1.0.4   aks-veryprivate-30529318-vmss000000  <none>  
   <none>
kube-system  kube-proxy-294vn                                     1/1    
Running  0         16h  10.1.0.4   aks-veryprivate-30529318-vmss000000  <none>  
   <none>
quux-proxy   quux-proxy-79fb4757cb-2jzr5                          1/1    
Running  0         40m  10.2.0.29  aks-public-30529318-vmss000000       <none>  
   <none>
foo-proxy    foo-proxy-569857f898-x2rv4                           1/1    
Running  0         40m  10.2.0.34  aks-public-30529318-vmss000000       <none>  
   <none>
kube-system  calico-node-mr6nf                                    1/1    
Running  0         17h  10.2.0.4   aks-public-30529318-vmss000000       <none>  
   <none>
kube-system  kube-proxy-r76r6                                     1/1    
Running  0         17h  10.2.0.4   aks-public-30529318-vmss000000       <none>  
   <none>
kube-system  kubernetes-dashboard-cc4cc9f58-hpncw                 1/1    
Running  2         17h  10.4.0.16  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  coredns-7fc597cc45-b9jbv                             1/1    
Running  0         17h  10.4.0.20  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  tunnelfoo-5d96bdcb54-wxbsb                           1/1    
Running  0         17h  10.4.0.21  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  calico-typha-horizontal-autoscaler-77df4784d7-hhl6g  1/1    
Running  0         17h  10.4.0.22  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  coredns-autoscaler-7ccc76bfbd-d42xk                  1/1    
Running  0         17h  10.4.0.25  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  coredns-7fc597cc45-gkf46                             1/1    
Running  1         17h  10.4.0.31  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  metrics-server-58b6fcfd54-4t28d                      1/1    
Running  2         17h  10.4.0.33  aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  calico-node-6z8rs                                    1/1    
Running  0         17h  10.4.0.4   aks-untainted-30529318-vmss000000    <none>  
   <none>
kube-system  calico-typha-6b998f8fd7-clzh7                        1/1    
Running  0         17h  10.4.0.4   aks-untainted-30529318-vmss000000    <none>  
   <none>