SSH POWER BASH

ssh.markdown

SOUND WHEN GET A RESPONSE

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ping -i 60 -a ADDRESS

S.O/HARD INFOS

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gnu

uname -a   

grep flags /proc/cpuinfo

lscpu

sudo lshw -short

hwinfo --short

darwin

system_profiler

sysctl hw

SSH KEY TO ACCESS

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• Generate SSH KEY in client

ssh-keygen -t rsa

• Copy the client .pub

cat ~/.ssh/id_rsa.pub

• Paste in server

cat ~/.ssh/id_rsa.pub | ssh user@machine “mkdir ~/.ssh; cat >> ~/.ssh/authorized_keys”  || ssh-copy-id user@host

• Restart ssh service in server

/etc/init.d/ssh restart ||  service sshd restart

LIST PROCESSES

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sudo lsof -i | grep LISTEN

FIND ANYTHING BY NAME

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find . -name "name*"

just dir

find . -name "name*" -d

just last X day(s)

find . -mtime -2

FIND ANYTHING BY NAME AND EXEC REMOVE OR SOME THING LIKE

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find . -name ".git*" -exec rm -r "{}" \;

DISK USED ON DIR OR FILE

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du -hs *

ON USERS

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who

w

COPY FILE/DIR OF ANOTHER PLACE

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scp -r user@place:/file_or_dir /to/file_or_dir

FIND EXPRESSION ON FILE(S)

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digits

grep -r '[0-9][0-9]' /dir && grep '[0-9][0-9]' /file

blank lines

grep -r '^$' /dir && grep '^$' /file

Foo foo FOO FoO..

grep -r '[fF][oO][oO]$' /dir && grep '[fF][oO][oO]$' /file

TUNNEL FROM PLACE-PORT TO YOUR PLACE-PORT

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ssh -N -LX:localhost:Y machine YOUT LOCAL ON 80 TO 3000 http://localhost->http://localhost:3000

ssh -N -L3000:localhost:80 localhost

DIFF FILES

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local

diff /foo /bar

external

ssh user@host cat /path/to/remotefile | diff /path/to/localfile –

LIST DETAILED INFO

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ls -alh

WATCH FILE CONTINUOUSLY

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tail -f /file

SEE X LAST LINES

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tail -200 /file 

SEE X FIRST LINES

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tail -200 /file

SYMLINK

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ln -s /dir to-dir

LAST X LOGINS TO USER

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last -20 user name-user

CREATE TAR FILES

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tar -cvf output.tar /dirname || tar -cvf output.tar /dirname1 /dirname2 filename1 filename2 || tar -cvf output.tar /home/vivek/data /home/vivek/pictures /home/vivek/file.txt || tar -cvf /tmp/output.tar /home/vivek/data /home/vivek/pictures /home/vivek/file.txt

VIEW CONTENT TAR FILES

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tar -tvf /tmp/data.tar

EXTRACT CONTENT TAR FILES

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tar -xvf /tmp/data.tar || tar -xvf data-backup.tar resume.pdf || tar -xvf data-backup.tar pic1.jpg file1.doc foo.movf

• c : Create a tar ball.
• v : Verbose output (show progress).
• f : Output tar ball archive file name.
• x : Extract all files from archive.tar.
• t : Display the contents (file list) of an archive.

SEE USED PARTITIONS

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df

DIFF FILES

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diff foo.txt bar.txt

SIZE DIR

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du -h

USERS INFO

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finger

SIMPLE MONIT TOP

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top -l 1 -s 0 | awk ' /Processes/ || /PhysMem/ || /Load Avg/{print}'

DOWN

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halt

shutdown -r now   

DOWN

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halt

TEN LAST COMMANDS

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history | tail -10

USER AGENT TEXT MODE ( ON MAC SEE: lynxlet )

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lynx

SEE HOW MANY HOURS UP SYS

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uptime

MATH CALCULATION

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expr 1+1

SIMILAR WORDS

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look car

4EVER PRINT

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yes "Hello bich"

REVERSE FILE PRINT

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tac file.txt

FIND PROCESS ON PORT

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lsof -i :80

FIND PROCESS ON PORT AND KILL OR MORE

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lsof -P | grep ':3000' | awk '{print $2}' | xargs kill -9 

ps auxwww | grep postgres

sudo launchctl list | grep post

sudo lsof -i -P | grep -i "listen"

netstat -lptu OR netstat -tln

find and kill specified proccess

ps -ef | pgrep -f "cypress" | xargs kill -9 # killall cypress

list used ports:

netstat -tulpn