The maximum capacity of the virtual memory by
an address means and the external memory space of a computer system
2. The memory space
decisions
are
in linux
-l Link represents a linking
-d directory represented by directory
hosts file is a file on a charge of Linux ip address and domain name quickly resolved.
In the absence of a name server, and all network programs by querying the file to resolve a hostname ip address, or we need a dns service program to solve.
crontab linux is periodically executed, an instruction for setting the basic format of
time-day Monday
first column represents 1 minute to 59 per minute with or / 1 indicates
the second column represents 1 to 23 hours (0 = 0:00)
Third date column 1 to 31
in the fourth column from 1 to 12 January
the fifth column of the week 0-6 (0 for Sunday)
tar operating .tar command
gzip compression command .gz compressed packet
compress: .z compressed file
uncompress: file decompression .z
find -name is to list all files in a directory
ls List files in current directory
c represents the resulting output file to c, c is does not exist, create c
crtl + z to running programs transferred to the background, foreground pause a job that is pending
crtl + x equivalent to copy
crtl + v When you enter text, you can insert characters
crtl + c interrupt