JeongYD

[Linux] RHCSA container

패키지 설치 [root@JeongYD01 mini]# yum install -y podman [root@JeongYD01 mini]# yum module install -y container-tools [root@JeongYD01 mini]# podman serch httpd [root@JeongYD01 mini]# podman pull docker.io/appertly/httpd [root@JeongYD01 mini]# podman images REPOSITORY TAG IMAGE ID CREATED SIZE docker.io/library/httpd latest 0a30f4c29d25 3 weeks ago 142 MB docker.io/appertly/httpd latest e8154ea9b12a 2..

Linux 2020. 12. 10. 23:24

[Linux] RHCSA tuned profile

현재 프로파일 [root@JeongYD01 ~]# tuned-adm active Current active profile: virtual-guest [root@JeongYD01 ~]# tuned-adm active Current active profile: powersave recommed 프로파일 [root@JeongYD01 ~]# tuned-adm recommend virtual-guest 프로파일 변경 [root@JeongYD01 ~]# tuned-adm profile virtual-guest [root@JeongYD01 ~]# tuned-adm active Current active profile: virtual-guest

Linux 2020. 12. 10. 04:24

[Linux] RHCSA chrony 설정(ntp)

1. chrony 설치 [root@JeongYD01 ~]# yum install -y chrony Last metadata expiration check: 2:43:54 ago on Mon Dec 7 06:40:40 2020. Package chrony-3.5-1.el8.x86_64 is already installed. Dependencies resolved. Nothing to do. Complete! 2. chrony.conf 파일에 ntp 서버 등록 및 chrony데몬 start [root@JeongYD01 ~]# vi /etc/chrony.conf [root@JeongYD01 ~]# systemctl start chronyd [root@JeongYD01 ~]# systemctl status ch..

Linux 2020. 12. 10. 01:10

[Linux] RHCSA find 활용

1. 파일 소유자가 mini 인 파일을 찾는다 [root@JeongYD01 find]# find / -user mini find: '/proc/8165/task/8165/fd/7': No such file or directory find: '/proc/8165/task/8165/fdinfo/7': No such file or directory find: '/proc/8165/fd/8': No such file or directory find: '/proc/8165/fdinfo/8': No such file or directory find: '/run/user/1000/gvfs': Permission denied /var/spool/mail/mini /home/mini /home/mini/.mozilla ..

Linux 2020. 12. 9. 18:50

[Linux] RHCSA SELinux http Listen 포트 추가

1. 기존 http 포트 확인 [root@JeongYD01 ~]# semanage port -l | grep http http_cache_port_t tcp 8080, 8118, 8123, 10001-10010 http_cache_port_t udp 3130 http_port_t tcp 80, 81, 443, 488, 8008, 8009, 8443, 9000 pegasus_http_port_t tcp 5988 pegasus_https_port_t tcp 5989 2. http 포트로 82포트 추가 [root@JeongYD01 ~]# semanage port -a -t http_port_t -p tcp 82 [root@JeongYD01 ~]# semanage port -l | grep http http_c..

Linux 2020. 12. 8. 17:59

[Linux] RHCSA Virtual Data Optimizer (VDO) volume 만들기

1. vdo, kmod-kvdo 패키지 설치 [root@JeongYD01 ~]# yum install -y vdo kmod-kvdo Last metadata expiration check: 0:10:14 ago on Mon Dec 7 00:40:06 2020. Package vdo-6.2.2.117-13.el8.x86_64 is already installed. Package kmod-kvdo-6.2.2.117-65.el8.x86_64 is already installed. Dependencies resolved. Nothing to do. Complete! 2. 사용할 device 확인 후 vdo 생성 [root@JeongYD01 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE M..

Linux 2020. 12. 7. 14:55

[Linux] RHCSA ssh-keygen

ssh 인증에 사용할 서명키 생성# ssh-keygen id_rsa.pub 라는 public 키가 생성된것 확인 password 입력 없이 접근하고 싶은 서버에 public 키 복사# ssh-copy-id -i id_rsa.pub root@192.168.0.112 password 입력 없이 접속 됨을 확인

Linux 2020. 11. 25. 12:14

[Linux] RHCSA swap 늘리기

기존 swap 용량 확인 [root@jeongyd01 ~]# free -m total used free shared buff/cache available Mem: 1819 570 824 12 424 1087 Swap: 5119 0 5119 [root@jeongyd01 ~]# swapon -s Filename Type Size Used Priority /dev/dm-1 partition 5242876 0 -2 swap 디바이스 생성 [root@jeongyd01 ~]# fdisk /dev/sdc Welcome to fdisk (util-linux 2.23.2). Changes will remain in memory only, until you decide to write them. Be careful bef..

Linux 2020. 11. 24. 02:10