$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" < /dev/null 2> /dev/null ; brew install caskroom/cask/brew-cask 2> /dev/null $ brew cask install diffmerge $ /usr/local/bin/diffmerge
utf-8 available special characters test
Common: “ ” ‘ ’ – — … ‐ ‒ ° © ® ™ • ½ ¼ ¾ ⅓ ⅔ † ‡ µ ¢ £ € « » ♠ ♣ ♥ ♦ ¿ � Math: - × ÷ ± ∞ π ∅ ≤ ≥ ≠ ≈ ∧ ∨ ∩ ∪ ∈ ∀ ∃ ∄ ∑ […]
centos 7 : mariadb Too many open files Hint
[root@owl47 lib]# cat /var/run/mariadb/mariadb.pid 29249 [root@owl47 lib]# cat /proc/29249/limits Limit Soft Limit Hard Limit Units Max cpu time unlimited unlimited […]
mariadb : user log & logrotate Hint
# vi /etc/my.cnf [mysqld] general-log general-log-file=/var/log/mariadb/queries.log log-output=table,file [mysqld_safe] long_query_time = 3 #log=/var/log/mariadb/mysqld.log log-slow-queries=/var/log/mariadb/mysqld-slow.log log-error=/var/log/mariadb/mariadb.log [mysqladmin] password = XXXXXXX user = root # vi /etc/logrotate.d/mariadb /var/log/mariadb/mariadb.log { create 640 mysql mysql notifempty daily […]
centos : cpu temperature monitor, lm_sensors
# yum install lm_sensors # sensors-detect # sensors
centos 7 : set multi gateway Hint
vi /etc/sysconfig/network-scripts/ifcfg-eth0 TYPE=Ethernet BOOTPROTO=none DEFROUTE=yes PEERDNS=yes PEERROUTES=yes IPV4_FAILURE_FATAL=no IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_PEERDNS=yes IPV6_PEERROUTES=yes IPV6_FAILURE_FATAL=no UUID=XXXX-XXXX-XXXX-XXXX-XXXXXXXXX NAME=eth0 DEVICE=eth0 ONBOOT=yes DNS1=XXX.XXX.XXX.XXX IPADDR=222.222.222.123 NETMASK=255.255.255.0 GATEWAY=222.222.222.1 vi /etc/sysconfig/network-scripts/ifcfg-eth1 HWADDR=XX:XX:XX:XX:XX:0C TYPE=Ethernet BOOTPROTO=none DNS1=114.141.2.92 DNS2=218.234.21.41 DEFROUTE=no IPV4_FAILURE_FATAL=no IPV6INIT=yes IPV6_AUTOCONF=yes IPV6_DEFROUTE=yes IPV6_FAILURE_FATAL=no NAME=eth1 UUID=XXXX-XXXX-XXXX-XXXX-XXXXXXXXX IPV6_PEERDNS=yes IPV6_PEERROUTES=yes ONBOOT=yes IPADDR=192.168.0.10 PREFIX=24 GATEWAY=192.168.0.1 vi /etc/sysconfig/network ip rule add from 222.222.222.0/24 pref 200 lookup […]
centos 7 : sshfs Hint
on Clinet ssh-keygen -t rsa ssh -p22 root@10.0.0.49 mkdir -p .ssh cat .ssh/id_rsa.pub | ssh -p22 root@10.0.0.49 'cat >> .ssh/authorized_keys' ssh -p22 root@10.0.0.49 sshfs -p 22 root@10.0.0.49:/data1/ /mnt/data1 -o allow_other,IdentityFile=~/.ssh/id_rsa
linux :pci nvme rescan Hint
# echo 1 > /sys/bus/pci/rescan # lspci -tv # partprobe # dmesg # systemctl daemon-reload
centos 7 : umount force Hint
fuser -cu /data9 fuser -ck /data9 umount /data9 umount -f /data9 umount -l /dev/sdk1
Centos 7 : nfs setup hint
on Server yum install nfs-utils rpcbind mkdir /test1 mkdir /test2 systemctl enable rpcbind systemctl enable nfs-server systemctl enable nfs-lock systemctl enable nfs-idmap systemctl start rpcbind systemctl start nfs-server systemctl start nfs-lock systemctl start nfs-idmap systemctl status rpcbind systemctl status nfs-server systemctl status nfs-lock systemctl status nfs-idmap vi /etc/exports /test1 […]