Linux Command Cheat Sheet
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sudo [command]
nohup [command]
man [command]
[command] &
>> [ļ¬leA]
> [ļ¬leA]
echo -n
xargs
1>2&
fg %N
jobs
ctrl-z
Basic commands
Pipe (redirect) output
run < command> in superuser
mode
run < command> immune to
hangup signal
display help pages of
< command>
run < command> and send task
to background
append to ļ¬leA, preserving
existing contents
output to ļ¬leA, overwriting
contents
display a line of text
build command line from
previous output
Redirect stdout to stderr
go to task N
list task
suspend current task
df -h, -i
mkfs -t -V
resize2fs
fsck -A -N
pvcreate
mount -a -t
fdisk -l
lvcreate
umount -f -v
Disk Utilities
File system usage
create ļ¬le system
update a ļ¬lesystem, after
lvextend*
ļ¬le system check & repair
create physical volume
mount a ļ¬lesystem
edit disk partition
create a logical volume
umount a ļ¬lesystem
chmod -c -R
touch -a -t
chown -c -R
chgrp -c -R
touch -a -t
File permission
chmod ļ¬le read, write and
executable permission
modify (or create) ļ¬le timestamp
change ļ¬le ownership
change ļ¬le group permission
modify (or create) ļ¬le
timestamp
tr -d
uniq -c -u
split -l
wc -w
head -n
cut -s
diļ¬ -q
join -i
more, less
sort -n
comm -3
cat -s
tail -f
File Utilities
translate or delete character
report or omit repeated lines
split ļ¬le into pieces
print newline, word, and byte
counts for each ļ¬le
output the ļ¬rst part of ļ¬les
remove section from ļ¬le
ļ¬le compare, line by line
join lines of two ļ¬les on a
common ļ¬eld
view ļ¬le content, one page at a
time
sort lines in text ļ¬le
compare two sorted ļ¬les, line
by line
concatenate ļ¬les to the
standard output
output last part of the ļ¬le
mkdir
rmdir
Directory Utilities
create a directory
remove a directory
ļ¬nd
ls -a -C -h
rm -r -f
locate -i
cp -a -R -i
du -s
ļ¬le -b -i
mv -f -i
grep, egrep, fgrep -i -v
File management
search for a ļ¬le
list content of directory
remove ļ¬les and directory
ļ¬nd ļ¬le, using updatedb(8)
database
copy ļ¬les or directory
disk usage
identify the ļ¬le type
move ļ¬les or directory
print lines matching pattern
tar xvfz
gzip, gunzip, zcat
uuencode, uudecode
zip, unzip -v
rpm
bzip2, bunzip2
rar
File compression
create or extract .tar or .tgz
ļ¬les
create, extract or view .gz ļ¬les
create or extract .Z ļ¬les
create or extract .ZIP ļ¬les
create or extract .rpm ļ¬les
create or extract .bz2 ļ¬les
create or extract .rar ļ¬les
ex
vi
nano
view
emacs
sublime
sed
pico
File Editor
basic editor
visual editor
pico clone
view ļ¬le only
extensible, customizable editor
yet another text editor
stream editor
simple editor
free -m
killall
sensors
top
kill -1 -9
service
[start|stop|restart]
ps aux
dmesg -k
Memory & Processes
display free and used system
memory
stop all process by name
CPU temperature
display current processes, real
time monitoring
send signal to process
manage or run sysV init script
display current processes,
snapshot
display system messages
netstat -r -v
telnet
tcpdump
ssh -i
ping -c
Network
print network information,
routing and connections
user interface to the TELNET
protocol
dump network traļ¬c
openSSH client
print routing packet trace to
host network
pwd -P
bc
expr
cal
export
` [command]
date -d
$[variable]
Misc Commands
print current working directory
high precision calculator
evaluate expression
print calender
assign or remove environment
variable
backquote, execute command
print formatted date
if set, access the variable
awk, gawk
tsh
" "
' '
python
bash
ksh
php
csh, tcsh
perl
source [ļ¬le]
Scripting
pattern scanning
tiny shell
anything within double quotes
is unchanged except \ and $
anything within single quote is
unchanged
"object-oriented programming
language"
GNU bourne-again SHell
korn shell
general-purpose scripting
language
C shell
Practical Extraction and Report
Language
load any functions ļ¬le into the
current shell, requires the ļ¬le
to be executable
Compiled by Alvin Khoo
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