How does EC2 install the public key from your keypair?
I am debugging creation of a custom AMI and it's not clear to me how EC2 actually installs the public key of your keypair onto your AMI... I presume it goes into ~someuser/.ssh/authorized_keys, but I cannot figure out if this is done exactly once, on every boot, or how the target user is determined.
Awk count frequency
Hey i want to count the amount of data in a certain column in awk. an example dataset is 2 5 8 1 3 7 8 5 9 and I want to count the frequency of the 5 in the second colum. This is what i tried that didn't work { total = 0; for(i=1;i<=NF;i++) { if(i==2) {if($i==5) {total++;} } printf("%s ", total); } }
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