| Command |
Description |
|
# umount /dev/hda2 |
unmount disk called hda2 - exit from mount point '/ mnt/hda2' first [man] |
|
# umount -n /mnt/hda2 |
run umount without writing the file /etc/mtab - useful when the file is read-only or the hard disk is full [man] |
|
# uname -m |
show architecture of machine(2) [man] |
|
# uname -r |
show used kernel version [man] |
|
# unix2dos fileunix.txt filedos.txt |
convert a text file format from UNIX to MSDOS [man] |
|
# unrar x file1.rar |
decompress rar archive [man] |
|
# unzip file1.zip |
decompress a zip archive [man] |
|
# useradd -c "User Linux" -g admin -d /home/user1 -s /bin/bash user1 |
create a new user "user1" belongs "admin" group [man] |
|
# useradd user1 |
create a new user [man] |
|
# userdel -r user1 |
delete a user ( '-r' eliminates home directory) [man] |
|
# usermod -c "User FTP" -g system -d /ftp/user1 -s /bin/nologin user1 |
change user attributes as description, group and other [man] |
Download offline copy 
U
