Difference between revisions of "util-vserver:Capabilities and Flags"

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(Reverted edits by 124.47.92.70, 24.93.239.151, 59.171.152.158)
(Setting context capabilities (ccaps))
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  echo ^6 >> ncapabilities
 
  echo ^6 >> ncapabilities
  
=== Setting context capabilities (ccaps) ===
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* Add the capabilities to a file named <code>ccapabilities</code>:
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echo SYSLOG >> ccapabilities
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* The default ccaps are:
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SET_UTSNAME
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RAW_ICMP
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=== Setting context flags (cflags) ===
 
=== Setting context flags (cflags) ===

Revision as of 15:29, 3 October 2008

This page discusses how to set capabilities and flags for a util-vserver guest. Also check http://www.nongnu.org/util-vserver/doc/conf/configuration.html for additional information. A couple of general rules applies to all of the files described on this page:

  • The filenames are all relative to the guest's configuration directory, which typically is /etc/vservers/<guest> but by default /usr/local/etc/vservers/<guest> when built from source.
  • One capability/flag per line
  • To remove something set by default, prefix it with ~, for instance:
echo ~SET_UTSNAME >> ccapabilities
  • Comments can be added with #:
echo \# Disable utsname configuration >> ccapabilities
  • To set a specific bit which does not yet have a name in util-vserver, you can use the following notation to set bit 6:
echo ^6 >> ncapabilities

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Contents

Setting context flags (cflags)

  • Add the flags to a file named flags:
echo VIRT_MEM >> flags
  • The default cflags are (in addition to the defaults set by the kernel):
HIDE_NETIF

Setting network flags (nflags)

  • Add the flags to a file named nflags:
echo HIDE_NETIF >> nflags
  • The default nflags are:
HIDE_NETIF

Setting POSIX capabilities (bcaps)

  • Add the capabilities to a file named bcapabilities:
echo CHOWN >> bcapabilities
  • The default bcaps are:
CHOWN
DAC_OVERRIDE
DAC_READ_SEARCH
FOWNER
FSETID
KILL
SETGID
SETUID
NET_BIND_SERVICE
SYS_CHROOT
SYS_PTRACE
SYS_BOOT
SYS_TTY_CONFIG
LEASE
AUDIT_WRITE

Setting network capabilities (ncaps)

  • Add the capabilities to a file named ncapabilities:
echo ^12 >> ncapabilities
  • There are no default ncaps.
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