7. usage of common linux Commands

7. usage of common linux commands 6. linuxXwindowsystem http://www.2cto.com/os/201303/197061.html System Information uname-m displays the processor architecture of the machine (2) uname-r displays the kernel version in use uname-a to list everything sh... 7. usage of common linux commands 6. linux X window system http://www.2cto.com/os/201303/197061.html System Information uname-m Display Machine processor architecture (2) uname-r display kernel version in use uname-a list all things shutdown-h now shut down system (1) file and directory cd-back to the last Directory ls-l show file and directory details ls-a show hidden file mkdir dir1 dir2 create two directories at the same time mkdir-p/tmp/dir1 /dir2 create a directory tree rmdir-r dir1 recursively delete all contents of a directory called 'dir1' cp-r source destination recursively copy all contents of source to destinationless filename with spaces and B representing downward and flip the page up to head-n 20 filename to select the first 20 lines of the file ln-s file1 lnk1 to create a soft link to the file or directory ln file1 lnk1 to create a physical pointing to the file or directory Link find/etc-name bing find the file named bing in/etc find/etc-perm mode find file permission = mode file umask 002 specifies the default permission of the current user to create a file the function of chmod 777 file suid sgid sbit. If you change the file permission to-rwsr-xr-x, chmod 4755 filechown jessie should be used: users file1.txt: Set the owner of the file file1.txt as the user of the users group, jessie chattr [+-=] [ai] filename + -- = hidden attribute of the file. mount device name mount point tar [-j | z] [c | x] v-f filename j 2.16.bz2 z 2.16.gz c package x unzipping v indicates that the file name being processed is displayed as the file to be processed during compression/decompression. vimdd deletes a row yy copy P paste ctrl + f ctrl + B flip x delete a character u ctrl + r undo ZZ save and exit o insert bashlogin shell in the next row of the cursor read/etc/profile and ~ /. Bash_profile or ~ /. Profilenologinshell read-only ~ /. Bash_profile or ~ /. The profilesource configuration file name can read the content of the configuration file into the current bash help display bash built-in command env View environment variable data redirection find/home-name. bashrc> list 2> & 1 pipeline command cut grep 'string' program and service management ps-e show all processes ps-l output ps aux in detail to list current memory all processes top-p specify a pid to monitor the keys P cpu M memory N pid q during top execution to killall-signal syslogd started by syslogd command