First, the date and time
1, date view, set the current system time
Display time format: +% Y -% m -% d
date -s "modified time": the modification time
2, hwclock (clock) for displaying the hardware clock time
3, cal: View Calendar
4, upitime: View system uptime
Second, the output of the view command
1, echo: displays the contents of the input
2, cat: show the file contents
3, head: displays the first few lines (default ten lines) file
-n specifies the maximum number of lines
4, tail: display a few lines at the end of the file (the default ten lines)
-n specifies the maximum number of lines
-f trace display file updates (generally used to view the log, the command will not quit, but continues to display the contents of the newly added)
5, more: page display file contents (only page down)
6, less: page display file contents (to bring the page)
Third, view hardware information
1, ispci: View PCI devices
For more information see -v production
2, isusb: view usb device
For more information see -v production
3, ismod: View loaded modules (Driver)
Fourth, shutdown, restart
1、shutdown
-h
-r
Immediate shutdown: shutdown -h now
Ten minutes later shutdown: shutdown -h 10
23.30 minutes Shutdown: shutdown -h 23:30
Restart immediately: shutdown -r now
2, power off: immediate shutdown
reboot: Restart immediately
Fourth, archiving, compression
1, zip: compressed files
zip.linuxcast.zip myfile (for compressed files)
2, unzip: unzip the file
unzip linuxcast.zip
3, gzip: compressed files
gzip linuxcast.net
4, tar: archive
tar -cvf out.tar linuxcast
tar -xvf linuxcast.tar
tar -cvzf backup.tar.gz / etc -z parameter archive files gzip compression to reduce the large
Fifth, find
1, locate: Oh tea fast axis files, folders
locate keyword
This command requires pre-established database, the default database is updated once a day, can updatedb command manually creating, updating database
2, find: Advanced Find files, folders
Find find find the location parameters
Such as:.. Find -name * linuxcast * Find -name ** represent multiple characters in the current file
find / -name * .conf Find all * .conf indicate to the end of the conf file in the root directory
find / -perm 777 -perm 777 Find the file permissions to 777
find / -type d return all listings
find . -name "a*" -exec is -l {}\;
find -group
find -ctime
find -size
