Index[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] UDP (User Datagram Protocol) packet loss slow DNS lookups synchronizing NTP ulimit command uname command Uniform Resource Locator (URL) Universal Serial Bus [See USB (Universal Serial Bus).] universal vulnerabilities unlocking accounts updating hardware kernels logs URL (Uniform Resource Locator) USB (Universal Serial Bus) local printing 2nd storage used drives User Datagram Protocol [See UDP (User Datagram Protocol).] usermode command users disassociation (printing) multiple OS panics multiuser mode profile files signals single user mode 2nd /usr/bin/run-parts script utilities [See tools.] utilization, CPUs 2nd |