man fakeroot Command

Man page for apt-get fakeroot Command

Man Page for fakeroot in Linux

This tutorial shows the man page for man fakeroot in linux.

Open terminal with 'su' access and type the command as shown below:
man fakeroot

Result of the Command Execution shown below:

fakeroot(1)                                                                 Debian manual                                                                fakeroot(1)



NAME
       fakeroot   run a command in an environment faking root privileges for file manipulation

SYNOPSIS
       fakeroot  [ l|  lib  library]  [  faked faked binary] [ i load file] [ s save file] [ u|  unknown is real ] [ b|  fd base ] [ h|  help ] [ v|  version ] [  ]
       [command]

DESCRIPTION
       fakeroot runs a command in an environment wherein it appears to have root privileges for file manipulation.  This is useful for allowing users to create  ar 
       chives  (tar,  ar, .deb etc.) with files in them with root permissions/ownership.  Without fakeroot one would need to have root privileges to create the con 
       stituent files of the archives with the correct permissions and ownership, and then pack them up, or one would have to construct the archives directly, with 
       out using the archiver.

       fakeroot  works  by  replacing  the  file manipulation library functions (chmod(2), stat(2) etc.) by ones that simulate the effect the real library functions
       would have had, had the user really been root. These wrapper functions are  in  a  shared  library  /usr/lib/libfakeroot.so*  which  is  loaded  through  the
       LD_PRELOAD mechanism of the dynamic loader. (See ld.so(8))

       If you intend to build packages with fakeroot, please try building the fakeroot package first: the "debian/rules build" stage has a few tests (testing mostly
       for bugs in old fakeroot versions). If those tests fail (for example because you have certain libc5 programs on your system), other packages you  build  with
       fakeroot will quite likely fail too, but possibly in much more subtle ways.

       Also,  note  that  it's best not to do the building of the binaries themselves under fakeroot. Especially configure and friends don't like it when the system
       suddenly behaves differently from what they expect. (or, they randomly unset some environment variables, some of which fakeroot needs).


OPTIONS
        l library,   lib library
              Specify an alternative wrapper library.

         faked binary
              Specify an alternative binary to use as faked.

       [  ] command
              Any command you want to be ran as fakeroot. Use '  ' if in the command you have other options that may confuse fakeroot's option parsing.

        s save file
              Save the fakeroot environment to save file on exit. This file can be used to restore the environment later using  i. However, this file will leak  and
              fakeroot will behave in odd ways unless you leave the files touched inside the fakeroot alone when outside the environment. Still, this can be useful.
              For example, it can be used with rsync(1) to back up and restore whole directory trees complete with user, group and device information without  need 
              ing to be root. See /usr/share/doc/fakeroot/README.saving for more details.

        i load file
              Load  a  fakeroot environment previously saved using  s from load file.  Note that this does not implicitly save the file, use  s as well for that be 
              haviour. Using the same file for both  i and  s in a single fakeroot invocation is safe.

        u,   unknown is real
              Use the real ownership of files previously unknown to fakeroot instead of pretending they are owned by root:root.

        b fd  Specify fd base (TCP mode only). fd is the minimum file descriptor number to use for TCP connections; this may be important to  avoid  conflicts  with
              the file descriptors used by the programs being run under fakeroot.

        h     Display help.

        v     Display version.


EXAMPLES
       Here  is an example session with fakeroot.  Notice that inside the fake root environment file manipulation that requires root privileges succeeds, but is not
       really happening.

       $  whoami
       joost
       $ fakeroot /bin/bash
       

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