Pos 420 Unix Worksheet

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File Processing Commands Worksheet

1. What UID and PID have the highest amount of physical memory that a process has used and is not swapped out? Show all processes and full output.

2. Using a long listing and no process modifiers, what is the swap space amount for the bash command?

3. When using top command, what command would you use to kill a process?

4. If you were not using top command, what command would you use to kill a process?

5. What command would you use to manually mount the standard CD-ROM device /dev/db1 at /media/disk?

6. What command would you use to display the amount of available disk space on /dev/db1 in a human readable form?

7. Type in the command grep - - help to access the help manual. Using this information and the information from the text, how would you write a command to find the pattern “111” in a file called myfile.txt?

1.What UID and PID have the highest amount of physical memory that a process has used and is not swapped out? Show all processes and full output. top
press f
press d
press p

You'll will find cpu usage in descending order for all processes.

2. Using a long listing and no process modifiers, what is the swap space amount for the bash command? top -p pidof_bash
After typing the above command press A (Capital a). You will see the below output. 1 PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2021 xyz 20 0 XXXXX XXXX 1664 S 0 0.2 0:00.43 bash
2 PID PPID TIME+ %CPU %MEM PR NI S VIRT SWAP RES UID COMMAND 2021 2019 0:00.43 0 0.2 20 0 S 22132 16m 4952 1000 bash
3 PID %MEM VIRT SWAP RES CODE DATA SHR nFLT nDRT S PR NI %CPU COMMAND 2021 0.2 22132 16m 4952 XXX XXXX X664 1 0 S 20 0 0 bash
4 PID PPID UID USER RUSER TTY TIME+ %CPU %MEM S COMMAND
2021 2019 1000 xyz xyz pts/0 0:00.43 0 0.2 S bash

Above you can see the swap space.
You can also try
top -p pidofbash
press f
press p
press enter

You'll see the swap space too.
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