# if [ "$SERVICE" = "cli" ]; then

#   if [ -z "$DEBUG" ]; then

#     export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xmx1g -Xms1g -XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:+UseParNewGC -XX:-UseGCOverheadLimit"

#   else

#     export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xms10m -XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:-UseGCOverheadLimit"

#   fi

# fi

# The heap size of the jvm stared by hive shell script can be controlled via:

#

# export HADOOP_HEAPSIZE=1024

# if [ "$SERVICE" = "cli" ]; then

#   if [ -z "$DEBUG" ]; then

     export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xmx1g -Xms1g -XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:+UseParNewGC -XX:-UseGCOverheadLimit"

#   else

#     export HADOOP_OPTS="$HADOOP_OPTS -XX:NewRatio=12 -Xms10m -XX:MaxHeapFreeRatio=40 -XX:MinHeapFreeRatio=15 -XX:-UseGCOverheadLimit"

#   fi

# fi

# The heap size of the jvm stared by hive shell script can be controlled via:

#

 export HADOOP_HEAPSIZE=1024

/usr/lib/hive/

/usr/lib/hadoop

/usr/lib/hbase/

/usr/lib/avro/

/usr/bin/sqoop/
/usr/lib/hadoop-mapreduce/

$ hadoop jar /usr/lib/hadoop-mapreduce/hadoop-streaming-2.6.0-cdh5.5.1.jar -D mapred.job.priority=LOW -D mapred.job.name="test" -D mapred.output.compress=false  -output=하둡디렉토리위치 -mapper=map.py -file=map.py -numReduceTasks 0

$ wget https://fedorahosted.org/releases/l/o/logrotate/logrotate-3.8.7.tar.gz 

$ tar zxvf logrotate-3.8.7.tar.gz

$ cd logrotate-3.8.7.tar.gz

$ make

cc -E -Wall -D_GNU_SOURCE -DLinux -DVERSION=\"3.8.7\"   -g    -M logrotate.c log.c config.c basenames.c  > .depend

logrotate.c:11:18: error: popt.h: 그런 파일이나 디렉터리가 없습니다

config.c:13:18: error: popt.h: 그런 파일이나 디렉터리가 없습니다

$ rpm -ql popt

/etc/popt.d

/lib64/libpopt.so.0

/lib64/libpopt.so.0.0.0

$ ls -al /usr/include/popt.h

ls: cannot access /usr/include/popt.h: 그런 파일이나 디렉터리가 없습니다

이 문제를 해결 하기 위해 popt-devel 모듈을 설치한다.

$ sudo yum install -y popt-devel

$ ls -al /usr/include/popt.h

-rw-r--r--. 1 root root 16566 2010-08-21 14:30 /usr/include/popt.h

$ make 

$ make install

 $ curl -s -w "%{time_namelookup} %{time_connect} %{time_appconnect} %{time_pretransfer} %{time_redirect} %{time_starttransfer} %{time_total}\n" -o /dev/null 'https://maps.googleapis.com/maps/api/staticmap?center=40.714728,-73.998672&zoom=15&size=300x200&maptype=roadmap

$ for i in {1..3}; do curl -s -w "%{time_namelookup} %{time_connect} %{time_appconnect} %{time_pretransfer} %{time_redirect} %{time_starttransfer} %{time_total}\n" -o /dev/null 'https://maps.googleapis.com/maps/api/staticmap?center=40.714728,-73.998672&zoom=15&size=300x200&maptype=roadmap'; done

$ for i in {1..3}; do time curl -I 'https://maps.googleapis.com/maps/api/staticmap?center=40.714728,-73.998672&zoom=15&size=300x200&maptype=roadmap' ; done

rsync -rvv /home/www/backup_11/ www@host:/home/www/backup_11/

Caused by: hudson.plugins.git.GitException: Command "git clone --progress -o origin git@github.com:adulion/.git /var/lib/jenkins/workspace/build social" returned status code 128:

$ sudo vi /etc/init.d/jenkins

JENKINS_USER=www

sudo chown -R www /var/log/jenkins

sudo chown -R www /var/lib/jenkins

sudo chown -R www /var/cache/jenkins

sudo chkconfig jenkins on

sudo service jenkins restart

$ git ls-remote -h git@github.com:profile/spec.git HEAD

(yes)

$ ssh git@github.com

PTY allocation request failed on channel 0

Hi html5/space! You've successfully authenticated, but GitHub does not provide shell access.

                                                                                            Connection to github.com closed.

$ cat > test.file

c1 place_1234 5

$ awk 'index($1, "place") == 0 {print}' test.file

c1 place_1234 5

$ awk 'index($1, "place") == 1 {print}' test.file

// 결과 없음

$ cat > test.file

c1 place_123 5

$ cat test.file | awk -v quote="'" '{ printf("insert into suggest_place (name, %s) values (%s,%s);\n", $1, quote $2 quote, $3 ); }'

// 결과
insert into suggest_place (name, c1) values ('place_123',5);

dd if=/dev/zero of=/home/samuel/swapfile bs=1M count=1024

dd if=/dev/zero of=/home/samuel/swapfile bs=1M count=1024

rsync --bwlimit=5120  -v  /home/samuel/swapfile  A.server::R`pwd`/swapfile 

$ sysctl -a | grep overcommit

vm.overcommit_memory=2

$ sysctl vm.overcommit_memory=1

$ echo "vm.overcommit_memory=1" >> /etc/sysctl.conf

The Linux kernel supports the following overcommit handling modes

0	-	Heuristic overcommit handling. Obvious overcommits of
		address space are refused. Used for a typical system. It
		ensures a seriously wild allocation fails while allowing
		overcommit to reduce swap usage.  root is allowed to 
		allocate slightly more memory in this mode. This is the 
		default.

1	-	Always overcommit. Appropriate for some scientific
		applications. Classic example is code using sparse arrays
		and just relying on the virtual memory consisting almost
		entirely of zero pages.

2	-	Don't overcommit. The total address space commit
		for the system is not permitted to exceed swap + a
		configurable amount (default is 50%) of physical RAM.
		Depending on the amount you use, in most situations
		this means a process will not be killed while accessing
		pages but will receive errors on memory allocation as
		appropriate.

		Useful for applications that want to guarantee their
		memory allocations will be available in the future
		without having to initialize every page.
 

The overcommit policy is set via the sysctl `vm.overcommit_memory'.

$ set -o vi 

$ aps -ef | grep java  (커서 위치)

$ (커서 위치) aps -ef | grep java

$ set -o vi 

$ sdf afdadsfsadfsadf (커서 위치) 

ps -ef | grep java