Visit Our UNIX and Linux User Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #594
Difficulty: Easy
In the C programming language, variables are scoped to the code block in which they are declared and are only valid within that code block.
True or False?
Linux & Unix Commands - Search Man Pages

cons.saver(8) [centos man page]

cons.saver(8)							   User Manuals 						     cons.saver(8)

cons.saver - general-purpose Linux console screen save and restore server SYNOPSIS
Invoke this helper program with the Ctrl-o key combination to save and restore the user session on the screen. OPTIONS
cons.saver takes only one argument, the TTY NAME from which the system will save and restore. SECURITY
Cons.saver does not need to be invoked by root. It only needs read and write access to /dev/vcsa*, which is a priviledged operation. You should create an unprivileged user, make cons.saver setuid to that user, and assure that all the vcsa* are owned by that user too. AUTHOR
Manpage written by Rodrigo Rubira Branco <> SEE ALSO
mc(1), mcserv(8) Linux May 16, 2006 cons.saver(8)

Check Out this Related Man Page

XSetScreenSaver()														 XSetScreenSaver()

  XSetScreenSaver - set the parameters of the screen saver.

  XSetScreenSaver(display, timeout, interval, prefer_blanking,
	Display *display;
	int timeout, interval;
	int prefer_blanking;
	int allow_exposures;

  display   Specifies a connection to an X server; returned from XOpenDisplay().

  timeout   Specifies the time of inactivity, in seconds, before the screen saver turns on.

  interval  Specifies  the  interval,  in  seconds,  between  screen saver invocations.  This is for intermittent changes to the display, not

	    Specifies whether to enable screen blanking.  Possible values are DontPreferBlanking, PreferBlanking, or DefaultBlanking.

	    Specifies the current screen saver control values.	Possible values are DontAllowExposures, AllowExposures, or DefaultExposures.

  XSetScreenSaver() sets the parameters that control the screen saver.	timeout and interval are specified in seconds.	 A  positive  timeout
  enables  the	screen	saver.	 A timeout of zero (0) disables the screen saver, while a timeout of -1 restores the default.  An interval of
  zero (0) disables the random pattern motion.	If no input from devices (keyboard, mouse, etc.) is generated for  the	specified  number  of
  timeout seconds, the screen saver is activated.

  For  each screen, if blanking is preferred and the hardware supports video blanking, the screen will simply go blank.  Otherwise, if either
  exposures are allowed or the screen can be regenerated without sending exposure events to clients, the screen is tiled with the root window
  background  tile,  with a random origin, each interval seconds.  Otherwise, the state of the screen does not change.	All screen states are
  restored at the next input from a device.

  If the server-dependent screen saver method supports periodic change, interval serves as a hint about how long the change period should be,
  and  a  value of zero (0) hints that no periodic change should be made.  Examples of ways to change the screen include scrambling the color
  map periodically, moving an icon image about the screen periodically, or tiling the screen with the root window background  tile,  randomly
  reoriginated periodically.

  For more information on the screen saver, see Volume One, Chapter 15, Other Programming Techniques.

  BadValue  timeout < -1.

See Also
  XActivateScreenSaver(), XForceScreenSaver(), XGetScreenSaver(), XResetScreenSaver().

Xlib - Screen Saver														 XSetScreenSaver()

15 More Discussions You Might Find Interesting

1. Fedora

Is UNIX an open source OS ?

Hi everyone, I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX. Ok onto business, my questions are-: Was/Is UNIX ever an open source operating system ? If UNIX was... (21 Replies)
Discussion started by: sreyan32
21 Replies

2. UNIX for Beginners Questions & Answers

Weird 'find' results

Hello and thanks in advance for any help anyone can offer me I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
Discussion started by: bodisha
14 Replies

3. UNIX for Beginners Questions & Answers

Set hard block limit for user using quota

hi all, i have installed quota on my centos 7 machine and its what im after (setting size limit on users, so they cant fill the hard drive) i want to now make this part of my create user script for my sftp server so i want to do a echo and a read command so i capture the limit they enter... (0 Replies)
Discussion started by: robertkwild
0 Replies

4. UNIX for Beginners Questions & Answers

Best performance UNIX just for HOST Virtualization?

Hi everybody, Which Unix base OS have best performance for HOST virtualization? I tested SmartOS but it needs another OS to connect remotely! Thanks in advance. (11 Replies)
Discussion started by: mbzadegan
11 Replies

5. UNIX for Beginners Questions & Answers

How to increment version inside a file?

Hi All, I need to write a shell script which opens a file and increments the version(text) within the file every time the script runs. For example: $ cat docker_file.yml version: '3.1' services: ui: image: $ So, I would like... (6 Replies)
Discussion started by: akshayupadhayay
6 Replies

6. Programming

DB2 convert digits to binary format

Dear Team We use DB2 v10.5 and using DBArtisan tool Can someone please guide how to convert digits to binary numbers using db2 feature. Ex> for number 9 , binary should be 1001 ( 8+1) Any help appreciated. Thanks (2 Replies)
Discussion started by: Perlbaby
2 Replies

7. UNIX for Advanced & Expert Users

Tar Command

hi folks, how to using tar with exclude directory and compress it using tar.Z i only know how to exclude dir only with this command below: tar -cvf /varios/restore/test.tar -X excludefile.txt /jfma/test1/ how to compress it using 1 command? Thanx Please use CODE tags as... (6 Replies)
Discussion started by: only
6 Replies

8. UNIX for Advanced & Expert Users

CentOS7 restoring file capabilities

Quite an obscure question I think. We have a rebuild process for remote sites that allows us to PXE rebuild a till (actually a PC with a touch screen and various fancy bits) running CentOS. The current CentOS5 tills work just fine with a tar image restore and some personalisation. Sadly,... (4 Replies)
Discussion started by: rbatte1
4 Replies

9. Docker

Docker learning Phase-I

Hello All, I had recently learnt a bit of Docker(which provides containerization process). Here are some of my learning points from it. Let us start first with very basic question: What is Docker: Docker is a platform for sysadmins and developers to DEPLOY, DEVELOP and RUN applications ... (7 Replies)
Discussion started by: RavinderSingh13
7 Replies

10. UNIX for Advanced & Expert Users

Shopt -s histappend

What is the point of this? Whenever I close my shell it appends to the history file without adding this. I have never seen it overwrite my history file. # When the shell exits, append to the history file instead of overwriting it shopt -s histappend (3 Replies)
Discussion started by: cokedude
3 Replies

11. UNIX for Beginners Questions & Answers

Unsure why access time on a directory change isn't changing

Hello... And thanks in advance for any help anyone can offer me I was trying to work out the differences between displaying modify, access, and change times with the 'ls' command. Everything seems in order when I look at files, but the access time on a directory doesn't seem to change when I... (4 Replies)
Discussion started by: bodisha
4 Replies

12. UNIX for Beginners Questions & Answers

CentOS 6 ran out of space, need to reclaim it

Hello everyone, I am having an issue here with CentOS release 6.6 (Final) that shows all of the space used up, but I can't tell where the space went. Seemingly I am using up 100%, according to df -h Filesystem Size Used Avail Use% Mounted on... (27 Replies)
Discussion started by: DannyBoyCentOS
27 Replies

13. Shell Programming and Scripting

Controlling user input

I'm trying to use a bash script for a psych experiment that involves listening to sound files and responding. If I have something like the code below, how can I make sure that a key press is assigned to RESPONSE only after the second echo statement? for i in 1 2 3; do echo "Ready?" sleep 2 ... (10 Replies)
Discussion started by: darwin_886
10 Replies

14. Shell Programming and Scripting

[TIP] Processing YAML files with yq

After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely give it a chance in future. Example YAML-File: --- !ruby/object:Puppet::Node::Facts ... (1 Reply)
Discussion started by: stomp
1 Replies

15. What is on Your Mind?

Please Welcome Dave Munro to the Moderator Team!

Dear All, I am very pleased to announce that Dave Munro (gull04) is joining the Moderation Team, after being a very valuable member of for 15+ years. Dave is an IT Consultant with 30 years of experience this year, has worked in many of the industry vertical market segments and has... (6 Replies)
Discussion started by: Neo
6 Replies

Featured Tech Videos