netstat -i
shows what network are connected
tail /var/adm/syslog
shows tail end of specified file.
head <filename>
shows head of a file
man CC
online manual, topic CC
ls
List. like dir /w
ls -l
list with details
ls -l |more
page the output
du
Disk utilization. Like a tree.
mv <old> <new>
move. rename.
pwd
print working directory
$HOME
holds home directory
find / -name socket -print
find topic socket, print to screen
cc <name.cxx> <name2.cxx>
ANSI C compile
CC <name.cxx> -g
C++ compile with debugger info
ps -e
list all running processes with process ids
ps -e |grep swi
list all running processes starting with swi
kill <proc id>
stop a running process
cmod 777 <filename>
gives permission to all (wildcards allowed)
rm <filename>
removes file, wildcards allowed
cat <filename>
Dumps file contents to screen.
cat *.csv | filename
Concatenates all csv files in current folder to a single file.
cat *.csv | hdfs dfs -put - target filename
Concatenates all csv files in current folder to a file within Hadoop distributed file system (starting from edge node).
wc -l *.csv
Word Count for all CSV files in current folder.
