In this article, we will provide daily (day to day) using Hadoop Administration commands. These are most useful commands as an Admin.
Hadoop Daily using commands
Command 1 : Switch to root user
sudo -i sudo su -
Here once we logged in normal user then we need to switch to root user because as per admin level we need all permission access related
Command 2: Modify txt files / open log files
Here we need to see the log files or txt files.
Vi commands is daily to see the logs and insert some data to text files.
tail -100f name.log
To check error logs we can use this command
To check any log/error logs and files as well
Command 3 : Find commands
To find the files in any directory or path
find / -name namenode.log
Command 4 : Process commands
ps -ef | grep Kafka
This command used for to check the Kafka process or any other services process id and running status of the services.
kill -9 1234
To kill the process id
Command 5 : History commands
To check previous putty/prompt commands, history of the commands in the ssh session
history | grep kafka
To check Kafka related previous commands
Command 6 : Disk space commands
To check the all space related information
du -sh *
To check all each folder space information
Command 7 : Date commands
To check time stamp on node or hostname
Whether the host is up or not, we will use this command
Command 8 : Network commands
To check the whether the host is working or not
To check the network statistics
telnet <hostname> <port>
To check host and port is working or not
Command 9: List commands
To check all the information about the all files, date, size of the files
Juts it showing all files in the directory
Command 10 : System commands
To check system information, whether linux or any other os and versions of OS
To check the CPU utilization and cores related information.