Basic unix commands used in Administration

• ls –ltr               Shows all the files and sub directories in the  current directory.

• ls –la                 Shows all the hidden files and directories.

• df –k .               This command shows the space in a mount.

• du –sk *            Used to see the size of a directory.

• top                   Used to get the CPU/Memory Utilization for each process.

• ps  –eaf  | grep  <User Id>   To get the processes running with particular user id.

• kill  -9  <Process Id>        To terminate the process.

• cp  <File Name>  <New File Name> : This command is used to copy a file.

            cp file1.txt newdir

            cp file1.txt  file1bckup.txt

• rmdir  <Directory Name>                        To remove directory.

• rm  <File name>                                           To remove file.

• mv  <File Name>  <New Directory>   To move the files to another directory.

• chmod 777  <File_Name/Directory_Name>     Gives rwxrwxrwx permissions.

• chmod  755 <File_Name/Directory_Name>     Gives rwxr-xr-x permissions.

• chmod 775 <File_Name/Directory_Name>      Gives rwxrwxr-x permissions.

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• Steps to kill Informatica sessions from Linux.

• Step 1 : Get process id in sessLog from informatica monitor.

• Step 2:  Do pstree -p| grep -i session_pid

Which will display process tree line by line, child process will   be displayed at the last which one highlighted in below snapshot.

• Step 3 : Do kill -9 child_pid Which will kill only respective session it won’t affect to pmserver process.