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54 Cards in this Set

  • Front
  • Back
man
Command to show the manual of a command. This will help show what the command does and how to use it.
Info
Similar to man pages, it shows information regarding the command. Info uses "less" reader to display information.
tee
Used to help "pipe" linux data streams. It will take the data from a stream and pipe it to a text file and the output on your terminal (screen).
cat
Shows the contents of a text file.
xargs
Great program that allows you to use the output from one program as an argument in another program. Common use is with a command like...

find *.prof | xargs rm -f
join
Will join text files and group the lines together based on contents of the file.
paste
This is will join text files together on a line by line basis. Similar to the "join" command but it does not group the information. It's is just line 1 is matched with line 1 in a text file.
expand
This will convert Tabs to Spaces in a text file.
od
If a file is not an ASCII file, such as a graphic or music file, you can use the "od" command to display the giberish in numebrs.
sort
This will sort the standard output of a file.
split
This will split a file in different peices. Options include by bytes and number of lines.
tr
Kind of the "find and replace" command in the command-line world. This will allow you to have the program look for characters and replace those characters with others.
unexpand
Converts spaces to Tabs.
uniq
This command will delete duplicate lines in a text file.
fmt
Used to take a file that has long lines and reformats it to a more readable format with shorter lines.
nl
Adds numbers to lines in a text file.
pr
Prepares a file for printing.
lpr
Used to Print Files
head
By Default show the first 10 lines of a text file.
tail
By default shows the last 10 lines of a text file.
less
Newer File reader
more
Older File reader
cut
Extracts text from a file.
wc
Obtains a word count.
grep
Used to search for files that contain a certain string.
sed
Powerful tool to directly modify the contents of a file and sending it to standard output. Can be used in many many ways to modify a file.
rpm -i
Command to install an RPM file.
rpm -e
Command to uninstall an rpm file.
dpkg -i
Command to install a DEB package.
dpkg-r
Command to uninstall a debian package.
dpkg -p
Command to display package information for a DEB package.
yum
Used on RPM distrobutions to donwload no software packages.
apt-get
Used on Debian disrobutions to download new packages.
alien
Used to convert between cpio, rpm, and deb packages.
ln
Create a symblic link
ldd
Used to check which libraries a program uses.
ldconfig
Rebuild the library cache. This must be done when removing or adding libraries to a system.
ps
Used to show running processes.
top
Auto updating list of current processes running.
nice
Used to launch a program with a specified CPU Priority
renice
Used to reprioitize (for CPU) a currently running process.
kill
Used to kill a process by using the Process ID (PID)
killall
Used to kill a process by designating a process name.
modeprobe
Adds kernel modules and the required dependencies for them.
insmod
Loads kernel modules individually.
rmmod
Remove Kernel Module
df -h
Show which mount points are mounted to different partitions in human readable format.
mkswap
Make a Swap Partition
swapon
Turn on swap
dump2efs -h
Show detailed filesystem data in human readable format.
tune2fs
Used to change the options of a filesystem such as when it is checked or adding a journal.
debugfs
Combines the capabilites of dumpe2fs and tune2fs. Also enables you to recover deleted files.
fsck
Used to check filesystems for problems.
du -h
Display disk usage by folders in human readable format.