linux commands for hadoop administration

row selection mode, select Done, press Y to copy, press p to pasteFind and replace (entered in command mode in the bottom line)%s/sad/88888888888888 effect: Find all sad in file, replace with 88888888888888/you effect: Find you in the file and navigate to the first found place, press N to navigate to the next matching position (press N to the previous one)Copy filesCP somefile.1/home/hadoop/View File ContentsCat somefile Full output of file contents

--help //ls--helphelp //helplsman // Man lsinfo //info lsSecond, the Linux system command　Ps-af//List all Processes Ps-efNetstat-anop//list all network processesNano 1.txt //put the Nano 1.txt in the backgroundJobs//View current task processfg%1//put process number 1th in front of the foreground .bg%1//put it in the backgroundKill [-9] PID//kill Process, [9] Optional: Strong killWC 1.txt//Word statistics for 1.txt content, separated by inv

Restart Network Services Root permissions under Service network restartTurn off Firewall service iptables stopTurn off firewall auto start chkconfig iptables off To modify the default boot level for a system Vi/etc/inittab # 0-halt (Don't set Initdefault to this)# 1-single User mode# 2-multiuser, without NFS (the same as 3, if you don't have networking)# 3-full Multiuser mode# 4-unused# 5-x11# 6-reboot (Don't set Initdefault to this)#Id:3:initdefault:~ Start a fully functional character i

decompress, just replace the above command TAR-CVF/TAR-ZCVF/TAR-JCVF "C" in the "X".shut down/ Restart the machineShutdown-R shutdown Restart-H shutdown does not restartNow turn the machine off.Halt shut down the machineReboot restartVim UseVim three modes: Command mode, insert mode, edit mode. Use ESC or I or: to toggle the mode.Command mode:: Q exit: q! Force exit: Wq Save and exit: Set number Displays line numbers: Set Nonumber hidden line number/apache find Apache in the document press N to

============= mount and Login commands ========================================Mount: Mount command. For example, mount the optical drive Mount/dev/cdrom/mnt/cdrom, you can view the contents under the directory/mnt/cdrom, you want to exit the disc, you must use the Umount command, otherwise the optical drive will remain in the deadlock state: #umount/mnt/cdrom. You can also mount the drive letter, such as Mount-t vfat/dev/uba1/mnt, you can switch to/m

Description: Start learning Linux system, in order to facilitate viewing, special reprint a Linux common Operation command, reprint address: http://www.cnblogs.com/laov/p/3541414.htmlBody:Introduction to Linux and Ubuntu InstallationCommon directivesSystem administration CommandsPackaging compression-related commandsSh

-get: Used to automatically find the installation software, update software, generally require root permissions. So the format is sudo apt-get install (installation), sudo apt-get remove (uninstall), sudo apt-get upgrade (upgrade). If the xx file is missing when compiling, you need to re-download the Linux kernel and use apt-get install Linux-source.Add-apt-repository: The script adds the PPA to the current

copy 5.6 rsync: File Sync Tool 6. Linux User management and User Information Query command 6.1 useradd: Create user 6.2 Usermod: Modify user Information 6.3 Userdel: Delete User 6.4 Groupadd: Create a new user group 6.5 Groupdel: Delete a user group 6.6 passwd: Modify User Password 6.7 chage: Change the validity period of user name Password 6.8 chpasswd: Bulk Update user name password 6.9 su: Switch user 6.10 sudo: Execute command as another user 6.1

/inittab# 0-halt (do not set Initdefault to this)# 1-single User mode# 2-multiuser, without NFS (the same as 3, if you don't have networking)# 3-full Multiuser mode# 4-unused# 5-x11# 6-reboot (do not set Initdefault to this)#Id:3:initdefault:~Start the full-featured character interface with Level 3View information about the current process connection networkNetstat-nltpV. Common TOOLS directiveWC Statistical text information (number of lines, number of words, characters)Date and time when the sy

directory of MySQL Which MySQLFind the MySQL running directory VI ~ /. Add alias idea = "CD ~ to bashrc ~ /Idea117/bin; nohup./idea. Sh "Alias idea Quick Start [Root @ admaster ~] # Vi/etc/sysconfig/NetworkHostname = yourname[Root @ admaster ~] # Vi/etc/hosts127.0.0.1 localhost. localdomain localhost172.17.33.169 yourname // modify the hostname here[Root @ admaster ~] # Hostname supervisor2[Root @ admaster ~] # Su[Root @ supervisor2 ~] # Modify the Linux