On-demand scanning is performed by Scanner Daemon. It checks objects in the file system on your demand or according to a schedule and detects various threats that may be present in the system though inactive. It is necessary to run a system scan periodically using the Scanner section of the Dr.Web Anti-Virus for Linux Control Desk window.
You can start scanning manually (see below) or configure Scheduler to scan the system according to a specified schedule (see Configuring Schedules).

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Process load increases during scanning which may lead to rapid discharge of batteries. We recommend starting scans when portable computers are powered by mains electricity.
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To scan system manually
1. | Open the Scanner section of the Dr.Web Anti-Virus for Linux Control Desk window. |

Figure 3. Selecting scan mode and objects for scan.
2. | Select a scan mode (for details, see the file system pane): |
• | Express scan – run a quick check of the most vulnerable parts of the system only. |
• | Full scan – perform a full scan of the entire file system. |
• | Custom scan – manually specify files and folders that you want to check. |
• | User scan (if added) – check previously specified files and folders. |
The first three modes are present by default. They are also called "scan sets" because they contain information about sets of objects to be scanned. You can create user scan modes. To add a new mode, click the button under the list of scan modes and name the mode. You can create as many additional scan sets as you want and delete those that you do not need by selecting them and clicking the button under the list of scan modes.
3. | If you chose a Custom scan or user scan mode, select checkboxes next to the files and folders that you want to scan. |
You can add other objects to the scan by clicking the button under the list of scan objects. To delete an object that you do not need, select the object and click the button under the list of scan objects. When configuring a user scan mode, all settings are saved and then restored when you select the mode again (unlike when using the Custom scan mode).
4. | Click the button to select how to apply actions for detected threats. When automatic reaction is enabled, Scanner Daemon applies actions automatically as specified in the anti-virus preferences. In case of handling threats rights shortage automatic actions will not be applied. You can handle this threats manually, increased privileges previously. By default, Scanner Daemon allows you to select necessary action manually for each detected threat. |
5. | In the bottom right part of the Scanner section, click Start. After scan is started, information about a degree of completion of scanning process, name of the file being checked at the moment and some statistical information are displayed. |

Figure 4. Displaying results of the current check.
At any stage of scanning process you can perform one of the following actions:
• | pause check by pressing Pause button. To continue check press Continue button; |
• | stop the check completely by pressing Stop button. |
When scanning is finished Scanner Daemon displays all found infected and suspicious files in the main window. Remember that in manual processing mode Scanner Daemon only informs the user about detected threats.
If you want to check your system on demand in console mode, then run Dr.Web Console Scanner.
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