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Seamas O'Brien
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Seamas O'Brien

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Dover Police DashCam Confessional (Shake it Off): http://youtu.be/8XFBUM8dMqw
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Seamas O'Brien

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You can never have enough cheat sheets
 
Linux Cheat Sheet

More Detailed : http://linoxide.com/guide/linux-command-shelf.html

SYSTEM

#uname -a =>Displaylinux system information 
#uname -r =>isplay kernel release information 
#uptime =>Show how long the system has been running + load 
#hostname =>Show system host name 
#hostname -i =>Display the IP address of the host 
#last reboot =>Show system reboot history 
#date =>Show the current date and time 
#cal =>Show this month calendar 
#w =>Display who is online 
#whoami =>Who you are logged in as 
#finger user =>Display information about user

Hardware

#dmesg =>Detected hardware and boot messages 
#cat /proc/cpuinfo =>CPU model 
#cat /proc/meminfo =>Hardware memory 
#cat /proc/interrupts =>Lists the number of interrupts per CPU per I/O device
#lshw =>Displays information on hardware configuration of 
   the system
#lsblk =>Displays block device related information in Linux 
#free -m =>Used and free memory (-m for MB) 
#lspci -tv =>Show PCI devices 
#lsusb -tv =>Show USB devices 
#dmidecode =>Show hardware info from the BIOS 
#hdparm -i /dev/sda         =>Show info about disk sda
#hdparm -tT /dev/sda        =>Do a read speed test on disk sda
#badblocks -s /dev/sda     =>Test for unreadable blocks on disk sda

Users

#id =>Show the active user id with login and group 
#last =>Show last logins on the system 
#who =>Show who is logged on the system 
#groupadd admin =>Add group "admin" 
#useradd -c "Sam Tomshi"      =>g admin -m sam #Create user "sam" 
#userdel sam =>Delete user sam
#adduser sam =>Add user "sam" 
#usermod =>Modify user information

File Commands

#ls –al =>Display all information about files/ directories 
#pwd =>Show the path of current directory 
#mkdir directory-name      =>Create a directory 
#rm file-name             =>Delete file 
#rm -r directory-nam         =>Delete directory recursively 
#rm -f file-name         =>Forcefully remove file 
#rm -rf directory-name      =>Forcefully remove directory recursively 
#cp file1 file2 =>Copy file1 to file2 
#cp -r dir1 dir2 =>Copy dir1 to dir2, create dir2 if it doesn’t exist 
#mv file1 file2 =>Rename source to dest / move source to directory 
#ln –s /path/to/file-name link-name #Create symbolic link to file-name 
#touch file =>Create or update file 
#cat > file =>Place standard input into file 
#more file =>Output contents of file 
#head file =>Output first 10 lines of file 
#tail file =>Output last 10 lines of file 
#tail -f file =>Output contents of file as it grows starting with the 
   last 10 lines 
#gpg -c file =>Encrypt file 
#gpg file.gpg =>Decrypt file 
#wc =>print the number of bytes, words, and lines in files 
#xargs =>Execute command lines from standard input

Process Related

#ps =>Display your currently active processes 
#ps aux | grep 'telnet'      =>Find all process id related to telnet process 
#pmap =>Memory map of process 
#top =>Display all running processes 
#killpid =>Kill process with mentioned pid id 
#killall proc =>Kill all processes named proc
#pkill process-name =>Send signal to a process with its name
#bg =>Lists stopped or background jobs 
#fg =>Brings the most recent job to foreground 
#fg n =>Brings job n to the foreground
File Permission Related

#chmod octal file-name =>Change the permissions of file to octal 
Example 
#chmod 777 /data/test.c =>Set rwx permission for owner,group,world
#chmod 755 /data/test.c =>Set rwx permission for owner,rw for group 
   and world 
#chown owner-user file =>Change owner of the file 
#chown owner-user:owner-group file-name =>Change owner and group 
   owner of the file 
#chown owner-user:owner-group directory =>Change owner and group 
   owner of the directory

Network

#ifconfig –a =>Display all network ports and ip address 
#ifconfig eth0 =>Display specific ethernet port 
#ethtool eth0 =>Linux tool to show ethernet status 
#mii-tool eth0 =>Linux tool to show ethernet status 
#ping host =>Send echo request to test connection 
#whois domain =>Get who is information for domain 
#dig domain =>Get DNS information for domain 
#dig -x host =>Reverse lookup host 
#host google.com =>Lookup DNS ip address for the name 
#hostname –i =>Lookup local ip address 
#wget file =>Download file 
#netstat -tupl =>List active connections to / from system

Compression / Archives

#tar cf home.tar home =>Create tar named home.tar containing home/ 
#tar xf file.tar =>Extract the files from file.tar 
#tar czf file.tar.gz files =>Create a tar with gzip compression 
#gzip file =>Compress file and renames it to file.gz

Install Package

#rpm -i pkgname.rpm =>Install rpm based package 
#rpm -e pkgname =>Remove package 

Install from source
 
#./configure 
#make 
#make install

Search

#grep pattern files =>Search for pattern in files 
#grep -r pattern dir =>Search recursively for pattern in dir
#locate file =>Find all instances of file 
#find /home/tom -name 'index*'      =>Find files names that start with "index" 
#find /home -size +10000k       =>Find files larger than 10000k in /home

 
Login (ssh and telnet)


#ssh user@host =>Connect to host as user 
#ssh -p port user@host =>Connect to host using specific port 
#telnet host =>Connect to the system using telnet port

File Transfer

scp
#scp file.txt server2:/tmp     =>Secure copy file.txt to remote host /tmp folder 
rsync
#rsync -a /home/apps /backup/    =>Synchronize source to destination

Disk Usage

#df –h =>Show free space on mounted filesystems
#df -i =>Show free inodes on mounted filesystems
#fdisk -l =>Show disks partitions sizes and types
#du -ah =>Display disk usage in human readable form 
#du -sh =>Display total disk usage on the current directory

Directory Traverse

#cd .. =>To go up one level of the directory tree 
#cd =>Go to $HOME directory 
#cd /test =>Change to /test directory 
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Seamas O'Brien

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a geek bit
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Random NYC photos. 
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Earlier this morning finished a 4.14 miles Zombies Run! 
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Have him in circles
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Seamas O'Brien

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The Lookout Heartbleed Detector can be used to determine whether or not you...
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Happy Dancing...!
Pharrell Williams presents ”Happy” — the world's first 24 hour music video.
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Seamas O'Brien

Screen Shots (North Jersey)  - 
 
Here's my Screenshot for verification.
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Check your hangouts. +Seamas O'Brien
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happy new year everyone. 2013
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2013 movie to see, 
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Too funny...
Cheryl Allin originally shared:
 
Ooh, I don't think my ego could take it! I'd be devastated all day!
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People
Have him in circles
40 people
Polly Helm's profile photo
Sunghee Lee's profile photo
EZ Eagle's profile photo
Mal colm's profile photo
Antoinette O'Brien's profile photo
Ileen Zovluck's profile photo
Ken Breese's profile photo
Peter Simon's profile photo
Alex Viado's profile photo
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Instructional Technologist and New eMedia Developer
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CatNip for Everyone.
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been in the Tempest on B'way.
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