sudo
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Table of Contents
Files:
http://linux.overshoot.tv/usr/sbin/visudo
Distribution specific documentation:
https://wiki.gentoo.org/wiki/Sudo
Configuration
Build
Knowing how sudo was build is sometimes necessary to know which options are available. For example, it might be necessary to know whether sudo was build with the --with-env-editor option.
As a regular user, we can have basic information about the current version thus:
$ sudo --version
Sudo version 1.8.20p2
Sudoers policy plugin version 1.8.20p2
Sudoers file grammar version 46
Sudoers I/O plugin version 1.8.20p2As root, we can see all the options set at compile time thus:
$ sudo sudo --version
Password:
Sudo version 1.8.20p2
Configure options: --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --docdir=/usr/share/doc/sudo-1.8.20_p2 --htmldir=/usr/share/doc/sudo-1.8.20_p2/html --libdir=/usr/lib64 --enable-zlib=system --with-editor=/usr/libexec/editor --with-env-editor --with-plugindir=/usr/lib64/sudo --with-rundir=/var/run/sudo --with-secure-path=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/bin --with-vardir=/var/db/sudo --without-linux-audit --without-opie --disable-gcrypt --enable-nls --disable-openssl --without-insults --without-all-insults --with-ldap_conf_file=/etc/ldap.conf.sudo --with-ldap --with-pam --without-skey --without-selinux --with-sendmail
Sudoers policy plugin version 1.8.20p2
Sudoers file grammar version 46
Sudoers path: /etc/sudoers
nsswitch path: /etc/nsswitch.conf
ldap.conf path: /etc/ldap.conf.sudo
ldap.secret path: /etc/ldap.secret
Authentication methods: 'pam'
Syslog facility if syslog is being used for logging: authpriv
Syslog priority to use when user authenticates successfully: notice
Syslog priority to use when user authenticates unsuccessfully: alert
Send mail if the user is not in sudoers
Use a separate timestamp for each user/tty combo
Lecture user the first time they run sudo
Require users to authenticate by default
Root may run sudo
Allow some information gathering to give useful error messages
Visudo will honor the EDITOR environment variable
Set the LOGNAME and USER environment variables
Length at which to wrap log file lines (0 for no wrap): 80
Authentication timestamp timeout: 5.0 minutes
Password prompt timeout: 5.0 minutes
Number of tries to enter a password: 3
Umask to use or 0777 to use user's: 022
Path to mail program: /usr/sbin/sendmail
Flags for mail program: -t
Address to send mail to: root
Subject line for mail messages: *** SECURITY information for %h ***
Incorrect password message: Sorry, try again.
Path to lecture status dir: /var/db/sudo/lectured
Path to authentication timestamp dir: /var/run/sudo/ts
Default password prompt: Password:
Default user to run commands as: root
Value to override user's $PATH with: /bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:/opt/bin
Path to the editor for use by visudo: /usr/libexec/editor
When to require a password for 'list' pseudocommand: any
When to require a password for 'verify' pseudocommand: all
File descriptors >= 3 will be closed before executing a command
Reset the environment to a default set of variables
Environment variables to check for sanity:
TZ
TERM
LINGUAS
LC_*
LANGUAGE
LANG
COLORTERM
Environment variables to remove:
__BASH_FUNC<*
BASH_FUNC_*
RUBYOPT
RUBYLIB
PYTHONUSERBASE
PYTHONINSPECT
PYTHONPATH
PYTHONHOME
TMPPREFIX
ZDOTDIR
READNULLCMD
NULLCMD
FPATH
PERL5DB
PERL5OPT
PERL5LIB
PERLLIB
PERLIO_DEBUG
JAVA_TOOL_OPTIONS
SHELLOPTS
BASHOPTS
GLOBIGNORE
PS4
BASH_ENV
ENV
TERMCAP
TERMPATH
TERMINFO_DIRS
TERMINFO
_RLD*
LD_*
PATH_LOCALE
NLSPATH
HOSTALIASES
RES_OPTIONS
LOCALDOMAIN
CDPATH
IFS
Environment variables to preserve:
XAUTHORIZATION
XAUTHORITY
PS2
PS1
PATH
LS_COLORS
KRB5CCNAME
HOSTNAME
DISPLAY
COLORS
Locale to use while parsing sudoers: C
Compress I/O logs using zlib
Directory in which to store input/output logs: /var/log/sudo-io
File in which to store the input/output log: %{seq}
Add an entry to the utmp/utmpx file when allocating a pty
PAM service name to use
PAM service name to use for login shells
Attempt to establish PAM credentials for the target user
Create a new PAM session for the command to run in
Maximum I/O log sequence number: 0
Enable sudoers netgroup support
Check parent directories for writability when editing files with sudoedit
Allow commands to be run even if sudo cannot write to the audit log
Allow commands to be run even if sudo cannot write to the log file
Log entries larger than this value will be split into multiple syslog messages: 960
File mode to use for the I/O log files: 0600
Execute commands by file descriptor instead of by path: digest_only
Local IP address and netmask pairs:
192.168.1.101/255.255.255.0
fe80::434d:8469:af97:28c6/ffff:ffff:ffff:ffff::
Sudoers I/O plugin version 1.8.20p2EDITOR
See the $EDITOR of visudo.