Objective: Get DNSSEC root KSK (key-signing keys) keys.
Objective: Find files with setuid permissions on Unix / Linux.
Objective: Count the number of occurrences of a single character in a string.
Objective: Partially download a file or resume a broken download over HTTP/HTTPS on Unix / Linux.
Objective: Remove passphrase from a SSL private key.
Objective: Convert a number in decimal representation to hexadecimal format in a shell script.
Objective: Take a screenshot of an Android device display using adb shell.
Objective: Decode a PAM encoded SSL certificate and verify that it contains the correct information.
Problem: stderr redirection is not working.
Objective: Verify if an email address is valid.
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