SHELL SCRIPTING Operating System Interview Questions [44 Questions]

  1. UID and GIDWhat does UID and GID signify?
  2. UNIX Security MechanismsWhat are the different security mechanisms available in UNIX?
  3. UNIX ShellsWhat are the different types of shells available in UNIX?
  4. how to find how many users have logged in and logged out in last five minutes using shell scripts?how many users have logged in and logged out in last five or 10 minutes
  5. Shell Scripting questionnishanth.sed
    1h
    2,10{H;g}
    $q
    1,9d
    N
    D
    input_file
    aa
    bb
    cc
    dd
    ee
    ff
    gg
    hh
    ii
    jj
    kk
    ll
    mm


    script

    sed -f nishanth.sed input_file
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