arrayname[string]=value
Syntax:
for (var in arrayname)
actions
Code to identify shell used by how many users
Sample Code
BEGIN {
FS=":"
}
{user_shells[$7] +=1}
END{
for (shell in user_shells)
print shell "\t\t" user_shells[shell]
}
How it Works
We are creating an array name called user_shells for which we are mentioning index item is present on field 7. If the value of field 7 repeats then the respective index value is increased by 1.
to access the array we will be using for loop. for loop of awk will work slight differently compare to bash for loop.
In case of awk for loop, variable mentioned will be used as a index of the array. So printing the declared variable in awk will print the array index and the second part will print the array values for the respective index.
