Linux Quick Reference printable pdf download

LINUX Administrator’s

Put network card driver (e.g., e100) in

Mouse type, e.g.,

“rc.netdevice”

mouse

MOUSETYPE=Microsoft

/etc/rc.d/rc.netdevice

Quick Reference Card

/sbin/modprobe e100

XEMU3=yes

/etc/modules.conf

Or in “modules.conf”

network settings, contains

Jialong He

alias eth0 e100

NETWORKING=yes

network

/etc/HOSTNAME

/etc/NETWORKING

hostname is set by “/bin/hostname” during

(Slackware)

boot and the name is read from these files.

NFS File Sharing

User Management

May change manually.

/etc/sysconfig/network

Files

(Redhat)

/etc/fstab

file systems mounted during boot.

/etc/group

specify name server, DNS domain and

/etc/passwd

User account information.

search order. For Example:

/etc/exports

NFS server export list.

etc/resolv.conf

/etc/shadow

search la.asu.edu

/etc/auto.master

auto mount master file.

nameserver 129.219.17.200

/etc/bashrc

Commands

/etc/profile

host name to IP mapping file.

/etc/hosts

BASH system wide and per user init files.

$HOME/.bashrc

mount a file system or all entries in fstab.

host name information look up order.

mount

$HOME/.bash_profile

Example:

exportfs

export file system listed in exports

/etc/host.conf

/etc/csh.cshrc

order hosts, bind

showmount –e

show file systems exported

/etc/csh.login

multi on

hostname

$HOME/.cshrc

TCSH system wide and per user init files.

/etc/nsswitch.conf

new way to specify information source.

$HOME/.tcshrc

/etc/networks

$HOME/.login

Printer Configuration

/etc/protocols

TCP/IP services and ports mapping.

/etc/skel

template files for new users.

/etc/services

Files

/etc/default

default for certain commands.

/etc/rpc

RPC service name to their program numbers

/etc/printcap

Redhat and Slackware version info (Linux

/etc/redhat-release

mapping.

Printer capabilities data base.

/etc/printcap.local

/etc/slackware-version

kernel version with “uname –a”)

Commands

/etc/lpd.conf

LPRng configuration file.

Commands

menu driven Ethernet setup program.

netconfig

permissions control file for the LPRng line

/etc/lpd.perms

script to create an new user interactively

printer spooler

pppsetup

setup PPP connection (Slackware).

adduser

(slackware) or link to useradd (Redhat).

setup Ethernet during boot, for example

/etc/hosts.lpd

Access control (BSD lpd).

useradd, userdel,

create, delete, modify an new user or update

/etc/hosts.equiv

trusted hosts.

default new user information..

usermod

/sbin/ifconfig eth0 ${IPADDR} broadcast

PRINTER

Environment variable of default printer.

newusers

update and create new users (batch mode).

${BROADCAST} netmask ${NETMASK}

parallel port.

/dev/lp0

groupadd, groupdel,

ifconfig

add, delete or modify group.

/sbin/route add -net ${NETWORK} netmask

groupmod

Commands

${NETMASK} eth0

modify account policy (password length,

line printer control program, print queue

expire data etc.) or finger information (full

lpc, lpq, lprm

/sbin/route add default gw ${GATEWAY} netmask

chage. chfn, chsh

maintain

name, phone number etc.) change default login

0.0.0.0 metric 1

shell.

host

lookup host name or IP (similar to nslookup).

gain root access during boot prompt without

Sendmail

linux init=/bin/sh rw

dnsdomainname

show DNS domain name.

password, can be used to fix some problems.

Files

mount –w -n –o remount /

arping; arp

find out Ethernet address by first arping then arp.

makebootdisk

firewall and NAT (/etc/sysconfig/ipchains on Redhat)

“sendmail.cf” is the configuration file. “sendmail.mc” is

ipchains

make a bootable floppy disk

sendmail.cf

a macro file which can be used to generate “sendmail.cf”

iptables

firewall and NAT (/etc/sysconfig/iptables on Redhat)

sendmail.mc

by: m4 sendmail.mc > sendmail.cf

ntsysv

menu driven SYSV service configuration (Redhat)

mail aliases, must run “newaliases” after change. use

Network Configuration

aliases

chkconfig

command line SYSV service configuration (Redhat)

:include: to include external list in a file.

Files

per user aliases, use \yourname to prevent further expand

.forward

and keeps a copy in mailbox.

Redhat files in /etc/sysconfig

/etc/rc.d/rc.inet1

mail access control, FEATURE(access_db) should be set

(Slackware)

IP address, Network mask, Default gateway

Configuration Files

in sendmail.mc. For example, in /etc/mail/access

/etc/sysconfig/nework-

are in these files. May edit manually to

access

REJECT

scripts/ifcfg-eth0 (Redhat)

modify network parameters.

keyboard map, e.g.,

keyboard

RELAY

KEYBOARD=”/usr/lib/kdb/keytables/us.map”

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