THE ONE PAGE LINUX MANUAL
A summary of useful Linux commands
Version 3.0 May 1999 rm name

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Remove a file or directory called name Kill off an entire directory and all it’s includes files and subdirectories Copy the file called filename to the /home/dirname directory Move the file called filename to the /home/dirname directory Display the file called filetoview Display man pages containing keyword Display the file called filetoview one page at a time, proceed to next page using the spacebar Display the first 10 lines of the file called filetoview Display the first 20 lines of the file called filetoview Display the last 10 lines of the file called filetoview Display the last 20 lines of the file called filetoview

Starting & Stopping rm -rf name shutdown -h now halt shutdown -r 5 shutdown -r now reboot startx Shutdown the system now and do not reboot Stop all processes - same as above Shutdown the system in 5 minutes and reboot Shutdown the system now and reboot Stop all processes and then reboot - same as above Start the X system cp filename /home/dirname mv filename /home/dirname cat filetoview man -k keyword more filetoview

Accessing & mounting file systems mount -t iso9660 /dev/cdrom /mnt/cdrom mount -t msdos /dev/hdd /mnt/ddrive mount -t vfat /dev/hda1 /mnt/cdrive umount /mnt/cdrom Mount the device cdrom and call it cdrom under the /mnt directory Mount hard disk “d” as a msdos file system and call it ddrive under the /mnt directory Mount hard disk “a” as a VFAT file system and call it cdrive under the /mnt directory Unmount the cdrom

head filetoview head -20 filetoview tail filetoview tail -20 filetoview

Installing software for Linux rpm -ihv name.rpm rpm -Uhv name.rpm rpm -e package rpm -l package rpm -ql package rpm -i --force package Install the rpm package called name Upgrade the rpm package called name Delete the rpm package called package List the files in the package called package List the files and state the installed version of the package called package Reinstall the rpm package called name having deleted parts of it (not deleting using rpm -e) Decompress the files contained in the zipped and tarred archive called archive Execute the script preparing the installed files for compiling

Finding files and text within files find / -name fname find / -name ”*fname*” locate missingfilename Starting with the root directory, look for the file called fname Starting with the root directory, look for the file containing the string fname Find a file called missingfilename using the locate command - this assumes you have already used the command updatedb (see next) Create or update the database of files on all file systems attached to the linux root directory Show the subdirectory containing the executable file called missingfilename Starting with the directory called dir , look for and list all files containing textstringtofind

updatedb

which missingfilename grep textstringtofind /dir

tar -zxvf archive.tar.gz or tar -zxvf archive.tgz ./configure

The X Window System xvidtune XF86Setup Xconfigurator xf86config Run the X graphics tuning utility Run the X configuration menu with automatic probing of graphics cards Run another X configuration menu with automatic probing of graphics cards Run a text based X configuration menu

User Administration adduser accountname passwd accountname su exit Create a new user call accountname Give accountname a new password Log in as superuser from current login Stop being superuser and revert to normal user

Moving, copying, deleting & viewing files ls -l ls -F ls -laC List files in current directory using long format List files in current directory and indicate the file type List all files in current directory in long format and display in columns

Little known tips and tricks ifconfig apropos subject usermount List ip addresses for all devices on the machine List manual pages for subject Executes graphical application for mounting and unmounting file systems

/sbin/e2fsck hda5 fdformat /dev/fd0H1440 tar -cMf /dev/fd0 tail -f /var/log/messages cat /var/log/dmesg

Execute the filesystem check utility on partition hda5 Format the floppy disk in device fd0 Backup the contents of the current directory and subdirectories to multiple floppy disks Display the last 10 lines of the system log. Display the file containing the boot time messages - useful for locating problems. Alternatively, use the dmesg command. wildcard - represents everything. eg. cp from/* to will copy all files in the from directory to the to directory

File permissions

*

?

Single character wildcard. eg. cp config.? /configs will copy all files beginning with the name config. in the current directory to the directory named configs.

[xyz]

Choice of character wildcards. eg. ls [xyz]* will list all files in the current directory starting with the letter x, y, or z.

If the command ls -l is given, a long list of file names is displayed. The first column in this list details the permissions applying to the file. If a permission is missing for a owner, group of other, it is represented by - eg. drwxr-x—x
Read = 4 Write = 2 Execute = 1 File permissions are altered by giving the chmod command and the appropriate octal code for each user type. eg chmod 7 6 4 filename will make the file called filename R+W+X for the owner, R+W for the group and R for others. Full permission for the owner, read and execute access for the group and others. Make the file called filename executable to all users.

linux single

At the lilo prompt, start in single user mode. This is useful if you have forgotten your password. Boot in single user mode, then run the passwd command. List current processes Kill a specific process eg. kill 123

chmod 7 5 5 chmod +x filename

ps kill 123

Configuration files and what they do
/etc/profile /etc/fstab System wide environment variables for all users. List of devices and their associated mount points. Edit this file to add cdroms, DOS partitions and floppy drives at startup. Message of the day broadcast to all users at login. Bash script that is executed at the end of login process. Similar to autoexec.bat in DOS. Conatins full hostname including domain. There are 4 directories that automatically execute all scripts within the directory at intervals of hour, day, week or month. A list of all know host names and IP addresses on the machine. Paramters for the Apache web server Specifies the run level that the machine should boot into. Defines IP addresses of DNS servers. Config file for the SAMBA server. Allows file and print sharing with Microsoft clients. Define configuration for some Xapplications. ~ refers to user’s home directory. Config file for X-Windows. Defines the windows manager loaded by X. ~ refers to user’s home directory.

X Shortcuts - (mainly for Redhat)
Control|Alt + or Alt | escape Shift|Control F8 Right click on desktop background Shift|Control Altr Shift|Control Altx Increase or decrease the screen resolution. eg. from 640x480 to 800x600 Display list of active windows Resize the selected window Display menu Refresh the screen Start an xterm session

/etc/motd etc/rc.d/rc.local

/etc/HOSTNAME /etc/cron.*

Printing
/etc/rc.d/init.d/lpd start /etc/rc.d/init.d/lpd stop /etc/rc.d/init.d/lpd status lpq lprm lpr lpc man subject | lpr man -t subject | lpr printtool Start the print daemon Stop the print daemon Display status of the print daemon Display jobs in print queue Remove jobs from queue Print a file Printer control tool Print the manual page called subject as plain text Print the manual page called subject as Postscript output Start X printer setup interface

/etc/hosts /etc/httpd/conf /etc/inittab /etc/resolv.conf /etc/smb.conf

~/.Xdefaults

/etc/X11/XF86Confi g ~/.xinitrc

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