Hadoop Basic Linux Commands
Welcome to the world of best Linux commands used in Hadoop, In This tutorial, one can easily learn a List of all Top Rated Hadoop basic Linux commands which are available and are used by most of the Hadoop developers. Are you also dreaming to become to certified Pro Developer, then stop just dreaming get your Hadoop certification course from India’s Leading Big Data Training institute. So follow the below mentioned basic Linux commands for Hadoop from Prwatech and learn Hadoop Course like a pro from today itself under 15+ Years of Hands-on Experienced Professionals.
Basic Linux commands used in Hadoop
ls ⇒ directory listing
ls -al ⇒ formatted listing with hidden files
cd dir ⇒ change directory to dir
cd ⇒ change to home
pwd ⇒ shows current directory
mkdir dir ⇒ create a directory dir
rm file ⇒ delete the file
rm -r dir ⇒ delete directory dir
rm -f file ⇒ force remove the file
rm -rf dir ⇒ force remove directory dir *
cp file1 file2 ⇒ Copy file1 to file2
cp -r dir1 dir2 ⇒ copy dir1 to dir2; create dir2 if it is not present.
mv file1 file2 ⇒ rename or move file1 to file2 if file2 is an existing directory, moves file1 into
directory file2
ln -s file link ⇒ create a symbolic link to file
touch file ⇒ create or update file
cat > file ⇒ places standard input into the file
more file ⇒ output the contents of the file
head file ⇒ output the first 10 lines of the file
tail file ⇒ output the last 10 lines of the file
tail -f file ⇒ output the contents of the file as it
grows, starting with the last 10 lines
Permission Commands:
chmod ⇒ modify file access rights
su ⇒ temporarily become the superuser
sudo ⇒ temporarily become the superuser
chowm ⇒ change file ownership
chgrp ⇒ change a file's group ownership
System Info Commands :
date ⇒ shows the current date and time
cal ⇒ show this month's calendar
uptime ⇒ show current uptime
w ⇒ display who is online
whoami ⇒ who you are logged in as
finger user ⇒ display information about user
uname -a ⇒ show kernel information
cat /proc/cpuinfo ⇒ cpu information
cat /proc/meminfo ⇒ memory information
man command ⇒ show the manual for command
df ⇒ show disk usage
du ⇒ show directory space usage
free ⇒ show memory and swap usage
whereis app ⇒ show possible locations of app
which app ⇒ show which app will be run by default
Process Management Commands:
ps ⇒ display your currently active processes
top ⇒ display all running processes
kill pid ⇒ kill process id pid
killall proc ⇒ kill all processes named proc *
bg ⇒ lists stopped or background jobs; resume a
stopped job in the background
fg ⇒ brings the most recent job to foreground
fg n ⇒ brings job n to the foreground
SSH Commands
sshuser@host ⇒ connect to host as the user
ssh -p port user@host ⇒ connect to host on port
port as user
ssh-copy-id user@host ⇒ add your key to host for
user to enable a keyed or passwordlesslogin
Searching Commands
grep pattern files ⇒ search for pattern in files
grep -r pattern dir ⇒ search recursively for
pattern in dir
command | grep pattern ⇒ search for pattern in the output of the command
locate file ⇒ find all instances of file
Network Commands
ping host ⇒ ping host and output results
whois domain ⇒ get whoisinformation for domain
dig domain ⇒ get DNS information for domain
dig -x host ⇒ reverse lookup host
wget file ⇒ download file
wget -c file ⇒ continue a stopped download
Installation Commands
Install from source:
./configure
make
make install
dpkg-i pkg.deb ⇒ install a package (Debian)
