index_U

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uappnd flag  2nd 
uchg flag 
UFS (Unix File System) 
UFS1 filesystem and ACLs 
umount command  2nd 
unauthorized reboots, limiting 
unauthorized/authorized hosts 
UNC (Universal Naming Convention) 
uncompress command 
uninstalling applications, checking dependencies first 
unison utility 
Unix File System (UFS) 
Unix one-liner commands 
<Emphasis>Unix Power Tools<Default Para Font> 
unlimit command 
unlocking and locking screens 
unmounting
    floppies 
    remote shares 
    /tmp filesystem 
untarring archives 
updating systems
    automatically 
uploaddisk command 
uppercasing characters 
USB support in kernel configuration files 
user interaction
    adding to scripts 
    handling incorrect input 
users
    choosing memorable passwords 
    expiration dates for passwords 
users command 
/usr/local/etc/sudoers file 
/usr/src/share/skel/Makefile file, editing 
uunlnk flag  2nd