Most used commands in WAS

1) Tell me the command to find RAM size in AIX/Unix?


A) prtconf only for AIX.

2) Command to find disk free space?

A) Df –k or m

3) In ls -lrt, what t stands for and r stands for l stands for?

A)-l shows you huge amounts of information (permissions, owners, size, and when last modified.)

    -r reverses the order of how the files are displayed.

    -t shows you the files in modification time

4) How to check a particular port is listening or not in UNIX?

A) netstat -a
grep 80

5) How do you perform heap dump and thread dump?

A) Kill -3 <>

6). How to check disk usage in Linux or UNIX?

A) Du -k

7). How to check the multiple NIC in Unix or Linux?

A) ifconfig -a

8). How to identify and kill a process ID?

A) Ps –ef

9) How to find the process id (PID) using port no?for example 80 is the port no

A) lsof -i TCP:80

10) To find the no.of running JAVA process

A) ps -ef
grep java
wc -l

11) How to find out that a port is listening on remote Box ? Example 80 is the pot no

A) telnet Hostname 80

12) What to see only last 10 lines of a log file ?

A) tail -10 logfilename