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Full Discussion: Is it a joke or a command?
Top Forums UNIX for Beginners Questions & Answers Is it a joke or a command? Post 303034670 by MadeInGermany on Thursday 2nd of May 2019 05:28:03 AM
Old 05-02-2019
Looks like another fork bomb.
Harden your system! For example, RedHat/Centos 7.x has
Code:
# grep '^[^#]*nproc' /etc/security/limits.conf /etc/security/limits.d/*
/etc/security/limits.d/20-nproc.conf:*          soft    nproc     4096
/etc/security/limits.d/20-nproc.conf:root       soft    nproc     unlimited

At login (generally: at every system access) this limit is set by PAM. Can be verified with
Code:
ulimit -a

Caution, even if the root account were not excepted, the PAM might not set the limit for UID=0 accounts. Another reason to not run suspicious code as root!
This User Gave Thanks to MadeInGermany For This Post:
 

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XFLIP(6)							   Games Manual 							  XFLIP(6)

NAME
xflip, meltdown - astonish your friends with interesting X effects SYNOPSIS
xflip [-planes] [-vert] [-oblic] [-fast | -random] [-times number] [-display displayname] meltdown [-planes] [-display displayname] [-delay x] [-wait n | -wait 0] DESCRIPTION
This manual page documents briefly the xflip, and meltdown commands. This manual page was written for the Debian GNU/Linux distribution (but may be used by others), because the original program does not have a manual page. The programs play with the X display, producing some interesting effects. One traditional use of these commands is to have them run and affect someone else's X display, as a practical joke. OPTIONS
-display displayname The X display to operate on. -planes Operate on a singleplane at a time. -vert Flip the screen vertically. -oblic Flip the screen vertically and horizontally at the same time. -random Flip small random peices of the screen instead of the while display. -times number Specifies the number of peices of the screen to flip when -random is used. Default is 300. -delay x Meltdown may run too fast on fast computers to be fully appreciated; this can be used to slow it down. If specified, every x times the display is updated, a 1 microsecond delay will be inserted. The default is no delay at all. Reasonable values for x are in the 20 to 200 range. -wait n Makes meltdown wait for n seconds after the screen is totally black. If you pass 0 to -wait, it will wait until you press a key or mouse button. AUTHOR
This manual page was written by Joey Hess, for the Debian GNU/Linux system. XFLIP(6)
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