Deep dive into Kernel

In CentOS,update at /etc/sysconfig/network http://serverfault.com/questions/567249/centos-multiple-nics-routing-issue

/etc/inputrc set bell-style none

자신의 계정에 root 권한을 주는 방법으로는 sudoer를 이용할 수 있다. /etc/sudoers.d 디렉토리 밑에 새로운 파일을 만든다.ㅇ 그룹으로 관리하고 싶을 경우, /etc/sudoers.d/my_company User_Alias DEV = sunshout,sunshout2 DEV ALL=(ALL) NOPASSWD: ALL

process 감시https://github.com/influxdata/telegraf/tree/master/plugins/inputs/procstat

네트워크 트래픽SELECT derivative(mean("bytes_recv"),1s) FROM "net" WHERE "interface" = 'eth0' AND $timeFilter GROUP BY time(10s), "host" 디스크 사용량SELECT mean("used_percent") FROM "disk" WHERE "device" = 'xvdb' AND $timeFilter GROUP BY time(10s), "host" Memory 사용량SELECT mean("used_percent") FROM "mem" WHERE $timeFilter GROUP BY time(10s), "host" CPU 사용량SELECT 100-mean("usage_idle") FROM "cpu" WHERE "cpu" ..

CentOS에서 보면 /etc/cron.daily/etc/cron.hourly/etc/cron.weekly/etc/cron.monthly 디렉토리가 존재한다. 해당 디렉토리에서 shell script을 넣어두면 해당 주기별로 실행한다. ex) /etc/cron.daily/delete_log #!/bin/bash find /var/log -mtime +3 -exec rm {} \;그러면 실제적으로 어느 시간에 해당 cron이 도는지는 anacrontab을 통해서 알수 있다./etc/anacrontab 을 보면# /etc/anacrontab: configuration file for anacron # See anacron(8) and anacrontab(5) for details. SHELL=/bin/shP..

aws --region us-west-1 ec2 describe-images --owners aws-marketplace --filters Name=product-code,Values=aw0evgkw8e5c1q413zgy5pjce [choonho.son@ip-172-31-11-240 devops]$ aws --region us-west-1 ec2 describe-images --owners aws-marketplace --filters Name=product-code,Values=aw0evgkw8e5c1q413zgy5pjce{ "Images": [ { "ProductCodes": [ { "ProductCodeId": "aw0evgkw8e5c1q413zgy5pjce", "ProductCodeType": "..

/etc/bind/named.conf zone "autopilothub.com" IN { type master; file "/etc/bind/db.testbed";}; include "/etc/bind/named.conf.options";include "/etc/bind/named.conf.local";include "/etc/bind/named.conf.default-zones"; /etc/bind/db.testbed;; BIND data file for local loopback interface;$TTL 3600@ IN SOA autopilothub.com. root.autopilothub.com. ( 2 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Ex..

#version=DEVEL# System authorization informationauth --enableshadow --passalgo=sha512# Use network installationurl --url="http://ftp.daum.net/centos/7.3.1611/os/x86_64/"repo --name="New_Repository"# Use graphical installgraphical# Run the Setup Agent on first bootfirstboot --enableignoredisk --only-use=vda# Keyboard layoutskeyboard --vckeymap=us --xlayouts='us'# System languagelang en_US.UTF-8 #..

/etc/dhcp/dhclient.conf:prepend domain-name-servers x.x.x.x, y.y.y.y;