Which command can be used to display the total amounts of physical and swap memory in kilobytes and their utilizations?

Which command can be used to display the total amounts of physical and swap memory in kilobytes and their utilizations?

T/F – The free command can be used to display the total amounts of physical and swap memory in Kilobytes and their utilizations.

Which option to the IPTables command can be used to specify the default policy for a certain chain type?

iptables -P INPUT DROP The -P switch sets the default policy on the specified chain. So now we can set the default policy on the INPUT chain to DROP. This means that if an incoming packet does not match one of the following rules it will be dropped.

Which command can be used to see what network services are running on your network?

netstat
netstat. The netstat command can tell you about ongoing connections on the local system and ports (i.e., services) that are listening, indicating that services are waiting for requests to come through. By itself, netstat gives you a *lot* information. With a -a option, it gives you even more.

What command can be used to view and modify the date and time within the BIOS?

Just type hwclock, which will display the date and time of your system’s hardware clock. This is the same date and time that you’ll see from the BIOS screen. You can also use option -r, or –show to display the date and time.

Where is the .swap file in Linux?

To see swap size in Linux, type the command: swapon -s . You can also refer to the /proc/swaps file to see swap areas in use on Linux. Type free -m to see both your ram and your swap space usage in Linux. Finally, one can use the top or htop command to look for swap space Utilization on Linux too.

What is the difference between swap file and swap partition?

The swap partition is an independent section of the hard disk used solely for swapping; no other files can reside there. The swap file is a special file in the filesystem that resides amongst your system and data files. Each line lists a separate swap space being used by the system.

What does the option do in the command iptables?

1. Structure of iptables Options. The option allows the user to select a table other than the default filter table to use with the command. The option dictates a specific action to perform, such as appending or deleting the rule specified by the option.

How do I check my iptables status?

You can, however, easily check the status of iptables with the command systemctl status iptables. service or maybe just the service iptables status command — depending on your Linux distribution. You can also query iptables with the command iptables -L that will list the active rules.

How do I see networks in Linux?

Linux Commands to Check the Network

1. ping: Checks network connectivity.
2. ifconfig: Displays the configuration for a network interface.
3. traceroute: Shows the path taken to reach a host.
4. route: Displays the routing table and/or lets you configure it.
5. arp: Shows the address resolution table and/or lets you configure it.

How do I find network services?

Check Network Services

1. Click on My Computer > Control Panel > Network > Services. Make sure that the following services are listed:
2. Click the Protocols tab, and examine the Network Protocols. TCP/IP protocol should be the only one listed.
3. Click OK.

How do I check my BIOS?

Using the Command Prompt in Windows

1. Type CMD in the search box. Select Command Prompt or CMD.
2. The Command Prompt window appears. Type wmic bios get smbiosbiosversion and then press Enter. The string of letters and numbers following SMBBIOSBIOSVersion is the BIOS version. Write down the BIOS version number.

How do I know what type of BIOS I have?

Check Your BIOS Version by Using the System Information Panel. You can also find your BIOS’s version number in the System Information window. On Windows 7, 8, or 10, hit Windows+R, type “msinfo32” into the Run box, and then hit Enter. The BIOS version number is displayed on the System Summary pane.

What is the purpose of the SAR Command in Linux?

Sar command is used to produce statistical reports on a variety of resources including CPU usage, memory utilization, I/O devices consumption, network monitor, swap, and load averages. SAR stands for System Activity Reporter, very useful tools for any Linux administrator to monitor the system performance and to investigate the bottlenecks.

What is the SAR Command for Swap memory?

The swap memory is defined as the memory that can be borrowed from the hard disk when your RAM runs out of space. To check the swap memory-related statistics with the SAR command, we must first run the following command in our terminal: sar –S TimeInterval NoOfTimes.

Which is an example of SAR in sysstat?

Following are few variations: Use “sar -R” to identify number of memory pages freed, used, and cached per second by the system. Use “sar -H” to identify the hugepages (in KB) that are used and available. Use “sar -B” to generate paging statistics. i.e Number of KB paged in (and out) from disk per second.

Where can I find the help manual for SAR?

For SAR, the help manual can be accessed as follows: Run the following command in your terminal: sar –help. After executing this command, the syntax of the SAR command, all its variations and all the parameters that can be used with this command will be displayed.