$ etcdctl set /atomic.io/network/config '{"Network":"121.21.0.0/16","Backend":{"Type":"vxlan"}}'

$ etcdctl put /atomic.io/network/config '{"Network":"121.21.0.0/16","Backend":{"Type":"vxlan"}}'
$ etcdctl del /atomic.io/network/config

kubectl create clusterrolebinding test:anonymous --clusterrole=cluster-admin --user=system:anonymous

[vagrant@k8s master]$ kubectl create clusterrolebinding kubelet-bootstrap --clusterrole=system:node-bootstrapper --user=kubelet-bootstrap
clusterrolebinding.rbac.authorization.k8s.io/kubelet-bootstrap created

 sduo  cat > /etc/sysconfig/modules/ipvs.modules <<EOF
#!/bin/bash
modprobe -- ip_vs
modprobe -- ip_vs_rr
modprobe -- ip_vs_wrr
modprobe -- ip_vs_sh
modprobe -- ip_vs_nq
modprobe -- nf_conntrack_ipv4
EOF

[root@k8s kubernetes]# cat > /etc/sysctl.d/k8s.conf << EOF
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF

	cat>/usr/lib/systemd/system/kubelet.service<<EOF
[Unit]
Description=Kubernetes Kubelet Server
Documentation=https://github.com/GoogleCloudPlatform/kubernetes
After=docker.service
Requires=docker.service

[Service]
WorkingDirectory=/var/lib/kubelet
EnvironmentFile=/opt/kubernetes/kubelet.env
ExecStart=/opt/kubernetes/bin/kubelet  \$KUBELET_OPTIONS
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF

 cat>/opt/kubernetes/kubelet.env<<EOF
 KUBELET_OPTIONS=" --hostname-override=192.168.56.108 \
  --pod-infra-container-image=k8s.org/k8s/pause:3.4.1 \
  --bootstrap-kubeconfig=/opt/kubernetes/config/bootstrap.kubeconfig \
  --kubeconfig=/opt/kubernetes/config/kubelet.kubeconfig \
   --config=/opt/kubernetes/config/kubelet-conf.yaml   \
  --register-node=true \
  --cni-bin-dir=/opt/kubernetes/cni/bin --cni-conf-dir=/opt/kubernetes/cni/net.d --network-plugin=cni  \
   --runtime-cgroups=/systemd/system.slice  \
  --logtostderr=true "
EOF

--etcd-servers-overrides=/events#https://xxx:3379;https://xxx:3379;https://xxx:3379;https://xxxx:3379;https://xxx:3379

[root@testl etcd-v3.5.11]# ./etcdctl  member add  etcd04 --peer-urls="http://127.0.0.16:2350" --learner=true
Member 690b31e00158f43a added to cluster 99ae9d962d824d7b

ETCD_NAME="etcd4"
ETCD_INITIAL_CLUSTER="etcd4=http://127.0.0.1:2350,etcd3=http://127.0.0.1:2360,etcd1=http://127.0.0.1:2380,etcd2=http://127.0.0.1:2370"
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://127.0.0.1:2350"
ETCD_INITIAL_CLUSTER_STATE="existing"
#可以看到该成员尚未启动
[root@test etcd-v3.5.11]# ./etcdctl  member list -w table
+------------------+-----------+--------+----------------------------+-----------------------+------------+
|        ID        |  STATUS   |  NAME  |         PEER ADDRS         |     CLIENT ADDRS      | IS LEARNER |
+------------------+-----------+--------+----------------------------+-----------------------+------------+
| 690b31e00158f43a | unstarted |       | http://127.0.0.1:2350 |                       |       true |
| 6ea1523f71bf92f0 |   started | etcd3 |      http://127.0.0.1:2360 | http://127.0.0.1:2359 |      false |
| 7637173a60d743e5 |   started | etcd1 |      http://127.0.0.1:2380 | http://127.0.0.1:2379 |      false |
| ce6b0efed2935560 |   started | etcd2 |      http://127.0.0.1:2370 | http://127.0.0.1:2369 |      false |
+------------------+-----------+--------+----------------------------+-----------------------+------------+

[root@test etcd-v3.5.11]# ./etcdctl  member  promote c64a0c36c4a5869f
Member c64a0c36c4a5869f promoted in cluster 99ae9d962d824d7b
[root@test etcd-v3.5.11]# ./etcdctl  member list -w table
+------------------+---------+--------+-----------------------+-----------------------+------------+
|        ID        | STATUS  |  NAME  |      PEER ADDRS       |     CLIENT ADDRS      | IS LEARNER |
+------------------+---------+--------+-----------------------+-----------------------+------------+
| 6ea1523f71bf92f0 | started | etcd3 | http://127.0.0.1:2360 | http://127.0.0.1:2359 |      false |
| 7637173a60d743e5 | started | etcd1 | http://127.0.0.1:2380 | http://127.0.0.1:2379 |      false |
| c64a0c36c4a5869f | started | etcd4 | http://127.0.0.1:2350 | http://127.0.0.1:2349 |      false |  #可以看到已经不是learner了
| ce6b0efed2935560 | started | etcd2 | http://127.0.0.1:2370 | http://127.0.0.1:2369 |      false |
+------------------+---------+--------+-----------------------+-----------------------+------------+

#!/bin/bash

DIR="$(cd "$(dirname "$0")" && pwd)"
cd $DIR
export LD_LIBRARY_PATH=$DIR:$LD_LIBRARY_PATH


hosts=/etc/hosts
conf=/var/lib/redis/nodes.conf

newip=$(cat $hosts|grep redis-app|awk '{print $1}')
[ "$newip"x != ""x ] || {  echo "hosts里没有找到redis-app的ip,退出" && exit 1; }

ckeckConf(){
    [ -f "$1" ] || { echo "集群配置文件nodes.conf不存在,集群初始化中..."  && return; }
    

    echo "检查nodes.conf文件内容..."
    arr="$(cat $1|grep -E "master|slave"|awk '{print $1}')"
    len=$(echo  "${arr}" | wc -l)
    echo -e "$len条clusterid,如下: \n""${arr}"
    [ "$len" -ne 1 ] || { echo "集群配置文件clusterid数目不对,请到nfs服务器核查node.conf文件,退出" && exit 1; }


    myselfid=$(cat $1 |grep myself|awk '{print $1}')
    [ "$myselfid"x != ""x ] || {  echo "nodes.conf里没有找到myselfid,退出" && exit 1; }
     echo "把新ip写入自身clusterid文件内..."
    echo $newip > $PWD/$myselfid 
    echo "k8s重启后: $myselfid -> $newip";

    for i in ${arr};
    do
        [ -f "./$i" ] || { echo "没有./$i这个目录" && continue; }

        checkip=$(cat ./$i)
        [ "$checkip"x != ""x ] || { echo "clusterid文件内容为空" && continue; }

        echo "执行命令:ping -c1 $checkip"
        $DIR/ping -c1 $checkip
        [ $? -ne 1 ] || { echo "ping $newip 结果返回ip不通" && continue; }

        oldip=$(cat $1 |grep -E "^$i"|awk '{print $2}'|cut -d ":" -f1)
        [ "$oldip"x != ""x ] || { echo "clusterid在nodes.conf里没有搜索到ip,退出" && exit 1; }

        echo "oldip:$oldip =========== newip:$checkip"
        sed -i "s/$oldip/$checkip/g" $1
        [ $? -ne 0 ] || { echo "完成替换,clusterid:$i === ip:$checkip" && continue; }     

    done
    
    echo "配置文件nodes.conf,检查完毕..."
}

echo "$newip 开始检查配置文件nodes.conf"
ckeckConf  $conf

[ "$(which redis-server)"x != ""x ] || { echo "找不到redis-server,退出" && exit 1; }
echo "开始启动服务...."
echo "执行命令:redis-server $1 --cluster-announce-ip $newip"
redis-server $1 --cluster-announce-ip $newip

kubectl -n devops get pods
NAME          READY   STATUS    RESTARTS   AGE
redis-app-0   1/1     Running   0          50m
redis-app-1   1/1     Running   0          50m
redis-app-2   1/1     Running   0          44m
redis-app-3   1/1     Running   0          38m
redis-app-4   1/1     Running   0          38m
redis-app-5   1/1     Running   0          38m

kubectl -n devops exec -it redis-app-2 /bin/bash
kubectl -n devops exec -it redis-app-4 /bin/bash

cs@debian:~/oss/hexo$ kubectl get svc -n devops
NAME                     TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)              AGE
jenkins                  ClusterIP   121.21.92.146    <none>        8081/TCP,50000/TCP   105d
redis-headless-service   ClusterIP   None             <none>        6379/TCP             13d
redis-service            ClusterIP   121.21.24.33     <none>        6379/TCP             13d
tomcat                   ClusterIP   121.21.191.100   <none>        8082/TCP             105d

cs@debian:~/oss/hexo$ kubectl exec -it redis-app-1 -n devops  /bin/bash
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl kubectl exec [POD] -- [COMMAND] instead.
.............
root@redis-app-1:/data# redis-cli  -c -h 121.21.24.33 -p 6379
121.21.24.33:6379> auth 123456
OK
121.21.24.33:6379> ping
PONG
121.21.24.33:6379> get test21
-> Redirected to slot [8530] located at 121.21.35.3:6379
(error) NOAUTH Authentication required.  
121.21.35.3:6379> auth 123456
OK
121.21.35.3:6379> get test21
"20220721cs"

cs@debian:/opt/kubernetes/yaml/k8s/tcp/redis$ redis-cli  -c  -p  6379
127.0.0.1:6379> auth 123456
OK
127.0.0.1:6379> ping
PONG

cs@debian:~/oss/hexo$  kubectl  get pod --field-selector status.podIP=121.21.35.3 -o wide -n devops
NAME          READY   STATUS    RESTARTS   AGE   IP            NODE     NOMINATED NODE   READINESS GATES
redis-app-1   1/1     Running   1          9d    121.21.35.3   node04   <none>           <none>

127.0.0.1:9736> ACL WHOAMI
"default"

127.0.0.1:9736> ACL SETUSER cs +@read +@write on allkeys
OK

127.0.0.1:9736> acl setuser cs +ping on allkeys
OK

127.0.0.1:9736> acl users
1) "cs"
2) "default"
3) "logs"

127.0.0.1:9736> acl list
1) "user cs on sanitize-payload #8d969eef6ecad3c29a3a629280e686cf0c3f5d5a86aff3ca12020c923adc6c92 ~* resetchannels -@all +@read +@write +ping"
2) "user default on sanitize-payload #bbdac2e00dec531c592e9ee501cc64fde0a4a1795bb164f156982a50a4774170 ~* &* +@all"
3) "user logs on sanitize-payload #bbdac2e00dec531c592e9ee501cc64fde0a4a1795bb164f156982a50a4774170 ~* resetchannels +@all"

127.0.0.1:6379> ACL SETUSER cs +@read +@write on mykey
#~code、~name 和 ~school 分别表示匹配键
127.0.0.1:6379> ACL SETUSER cs +@read ~code ~name ~school on db1 >mypassword

127.0.0.1:9736> ACL SETUSER test +@read +@write ~db:1 on allkeys >mypassword
127.0.0.1:9736> ACL SETUSER test +@read +@write ~db:9 on allkeys >test9
127.0.0.1:9736> CONFIG REWRITE

127.0.0.1:9736> CONFIG REWRITE
OK

save 900 1   # 900秒内至少有1个键被改变则进行快照保存
save 300 10  # 300秒内至少有10个键被改变则进行快照保存
save 60 10000 # 60秒内至少有10000个键被改变则进行快照保存

#AOF
appendonly yes
appendfsync  everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb

#!/bin/sh

arr=($(kubectl get pods -l app=redis -o jsonpath='{range.items[*]}{.status.podIP}:6379 '))
echo ${arr[@]}

master=$(echo ${arr[@]}|awk '{print $1" "$2" "$3}')
echo "指定主节点:$master"
echo "yes" | kubectl exec -it redis-app-2 -- redis-cli --cluster create $master

for i in $(seq 3 +1 5); do
	echo "添加从节点:"${arr[i]}  ${arr[0]}
	echo "yes" | kubectl exec -it redis-app-2 -- redis-cli --cluster add-node  ${arr[i]}  ${arr[0]} --cluster-slave
done

redis-cli -a <password> --cluster rebalance 192.168.33.147:6379
该操作较为花费时间，建议在晚上8 9点之后进行。1.2.

redis-cli -a <password> --cluster reshard 192.168.33.151:6379 --cluster-from fd9d994b67b91xasdff293b363dadcfe617a19gs1 --cluster-to 01981f970cfe668e1bfedfasb35175f85axde --cluster-slots 50 --cluster-yes
from后边跟 从哪个节点移出来的ID， to后边跟想移到哪个节点的ID， cluster-slots后边填多少个槽位 每次迁移。1.2.

redis-cli -h 192.168.33.34 -p 6379 -a <password> CLUSTER SETSLOT 2209 IMPORTING fd9d994b67b9193ba9f293b363dadcfe617a191d  某个槽位归属于某个节点
redis-cli  -a <password> CLUSTER SETSLOT 2209 MIGRATING fd9d994b67b9193ba9f293b363dadcfe617a191d  槽位迁移于某个节点
redis-cli  -a <password> CLUSTER SETSLOT 2209 NODE 8ee0a098c32642388b79912ba94c2e45f1d8af98 
2209 是槽位号。

#!/bin/bash

# 替换端口号为 Redis 集群的任意节点的端口
PORT=6379

# 获取集群节点信息
nodes_info=$(redis-cli -p $PORT CLUSTER NODES)

# 提取所有 node ID
echo "$nodes_info" | grep 'id=' | sed -e 's/.*id=\([^ ]*\) .*/\1/'

# 打印结果
echo "Node IDs in the cluster:"
echo "$node_ids"

[mysqld]
#server-id                      = 224
user = mysql
port                           = 3305
mysqlx_port                    = 33060
mysqlx_socket                  = /tmp/mysqlx.sock
datadir                        = /opt/mysql/data
socket                         = /tmp/mysql.sock
pid-file                       = /tmp/mysqld.pid
auto_increment_offset          = 2
auto_increment_increment       = 2 
log-error                      = /opt/mysql/log/error.log
slow-query-log                 = 1
slow-query-log-file            = /opt/mysql/log/slow.log
long_query_time                = 0.2
log-bin                        = bin.log
relay-log                      = relay.log
binlog_format                 =ROW
relay_log_recovery            = 1
character-set-client-handshake = FALSE
character-set-server           = utf8mb4
collation-server               = utf8mb4_unicode_ci
init_connect                   ='SET NAMES utf8mb4'
innodb_buffer_pool_size        = 1G
join_buffer_size               = 128M
sort_buffer_size               = 2M
read_rnd_buffer_size           = 2M
log_timestamps                 = SYSTEM
lower_case_table_names         = 1
default-authentication-plugin  =mysql_native_password

[client]
port=3306

[mysql]
default-character-set=utf8mb4


[mysqld]
port=3306
#password=123456
#character-set-client-handshake=FALSE  
character-set-server=utf8mb4 
#collation-server = utf8mb4_general_ci  
init_connect='SET NAMES utf8mb4'


basedir="D:/360Downloads/mysql-5.7.20-winx64"
#Path to the database root
datadir="D:/360Downloads/mysql-5.7.20-winx64/data"

log-error="D:/360Downloads/mysql-5.7.20-winx64/log/mysqld_err.log"
#log-bin="D:/360Downloads/mysql-5.7.20-winx64/log/mysqld_bin.bin"

default-storage-engine=INNODB
#从 5.6开始，timestamp 的默认行为已经是 deprecated 了
explicit_defaults_for_timestamp=true

sql_mode="STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION" 

CREATE USER 'repl'@'192.168.16.232' IDENTIFIED BY '123456';

GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.16.232';

[mysqld]
server-id=1

show master status;

[mysqld]
server-id=2
#设置为只读状态,针对普通MySQL数据库用户
read_only=1

mysql -uroot -h 主 -p  database >back.sql;

#登陆从库
source back.sql;

stop slave;

reset slave;

reset master;

CHANGE MASTER TO  

MASTER_HOST='master_host_name',

MASTER_USER='主用户名',

MASTER_PASSWORD='主密码',

MASTER_LOG_FILE='主status File',

MASTER_LOG_POS=主status Position;

start slave;

show slave status\G

sudo ls -l /proc/`pidof mysqld`/fd | wc
MySQL数据库里统计已经打开的文件数查看状态参数
 Open_table_definitions 和 Open_tables

配置文件 /etc/security/limits.conf
检查进程的限制:
cat /proc/`pidof mysqld`/limits|grep "Max open files'

xz -d mysql-8.0.28-linux-glibc2.17-x86_64-minimal.tar.xz
tar -xvf mysql-8.0.28-linux-glibc2.17-x86_64-minimal.tar

#添加组
sudo groupadd mysql
sudo useradd  -r -M -s /sbin/nologin  -g mysql mysql -d /opt/mysql

# cs 或 ${USER}
sudo chown mysql:${USER} -R  /opt/mysql/*

cs@debian:~/data/software$ cat /etc/group | grep mysql
mysql:x:512:cs
cs@debian:~/data/software$ cat /etc/passwd | grep mysql
mysql:x:512:512::/home/mysql:/sbin/nologin

$ sudo /opt/mysql/bin/mysqld  --initialize --user=mysql --console

url=/opt/mysql
sed -n "/^basedir=/s#=#==$url#"p ./mysql.server
sed -n "/^datadir=/s#=#=$url/data#"p ./mysql.server
sed -n "s#conf=.*#conf=$url/my.cnf#"p ./mysql.server

sudo cp /opt/mysql/support-files/mysql.server  /etc/init.d/mysql
设置为开机自动运行
sudo update-rc.d mysql defaults
设置为取消开机自动运行
sudo update-rc.d -f mysql remove

##### 临时密码登录,执行语句提示 You must reset your password using ALTER USER statement before executing this statement.
--- alter user user() identified by "123456";  ##密码字符串双引号

---低于版本8---SET PASSWORD FOR root@localhost = '123456';
---版本8以上---ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY '123456'; 

##用户密码过期时间250天
ALTER USER ‘cs’@‘localhost' PASSWORD EXPIRE INTERVAL 250 DAY;
###禁用过期     --恢复默认策略 PASSWORD EXPIRE DEFAULT----
ALTER USER 'cs'@'localhost' PASSWORD EXPIRE NEVER;

###密码过期的策略
show variables like 'default_password_lifetime';
---设置密码永不过期，需要把default_password_lifetime修改为 0
---set global default_password_lifetime = 0;

 CREATE USER 'cs'@'localhost' IDENTIFIED BY '123456';


###修改执行生效语句
flush privileges;

E:\MySQL\MySQL Server 5.7\bin>mysqld install MySQL --defaults-file="E:\MySQL\MySQL Server 5.7\my.ini"

bin>mysqld --initialize --user=mysql --console

net start MySQL

sc delete MySQL

❯ ls -l /tmp/mysql*
-rw-r----- 1 mysql mysql 6  6月  4 21:08 /tmp/mysqld.pid
srwxrwxrwx 1 mysql mysql 0  6月  4 21:08 /tmp/mysql.sock
-rw------- 1 mysql mysql 6  6月  4 21:08 /tmp/mysql.sock.lock
srwxrwxrwx 1 mysql mysql 0  6月  4 21:08 /tmp/mysqlx.sock
-rw------- 1 mysql mysql 6  6月  4 21:08 /tmp/mysqlx.sock.lock

/opt/mysql/bin/mysqld  --initialize-insecure --user=mysql  --lower-case-table-names=1
/opt/mysql/bin/mysqld --user=mysql  &

sudo netstat -apn | grep 3306

 #指定python的安装路径
❯ ./configure --prefix=/home/cs/.local/py3.10   --enable-optimizations 

❯ make -j8   
❯ make install 

❯ /home/cs/.local/py3.10/bin/python3.10 -m pip install --upgrade pip

#No module named ‘_ctypes’
sudo apt-get install libffi-dev
#No module named '_bz2'
❯ find /usr -type f -name _bz2*.so
 cp /usr/lib/python3.11/lib-dynload/_bz2.cpython-311-x86_64-linux-gnu.so  /home/cs/stable-diffusion-webui/venv/lib/python3.10/site-packages/_bz2.cpython-310-x86_64-linux-gnu.so

# gradio==3.32.0
pip install httpx==0.23.3

cs@debian:~/oss/typoraCracker$ sudo apt-get install python3-pip
cs@debian:~/oss/typoraCracker$ pip3 -V
pip 20.3.4 from /usr/local/lib/python3.5/dist-packages/pip (python 3.5)

cs@debian:~/oss/typoraCracker$ sudo pip3 install --upgrade pip
Collecting pip
  Downloading http://mirrors.aliyun.com/pypi/packages/27/79/8a850fe3496446ff0d584327ae44e7500daf6764ca1a382d2d02789accf7/pip-20.3.4-py2.py3-none-any.whl (1.5MB)
    100% |████████████████████████████████| 1.5MB 5.8MB/s 
Installing collected packages: pip
  Found existing installation: pip 9.0.1
    Not uninstalling pip at /usr/lib/python3/dist-packages, outside environment /usr
Successfully installed pip-20.3.4

https://pypi.doubanio.com/simple/豆瓣 
https://mirrors.aliyun.com/pypi/simple/ 阿里 
https://mirrors.bfsu.edu.cn/pypi/web/simple/ 中国科学技术大学
https://pypi.tuna.tsinghua.edu.cn/simple/ 清华大学

$ pip config set global.index-url https://mirrors.aliyun.com/pypi/simple/
Writing to ~/.config/pip/pip.conf

[global]
timeout = 6000
index-url = https://mirrors.aliyun.com/pypi/simple
extra-index-url = https://pypi.mirrors.ustc.edu.cn/simple/https://mirrors.aliyun.com/pypi/simple/https://pypi.tuna.tsinghua.edu.cn/simple/http://pypi.mirrors.ustc.edu.cn/simple/https://pypi.org/simple/
[install]
trusted-host = pypi.mirrors.ustc.edu.cnpypi.mirrors.ustc.edu.cnmirrors.aliyun.compypi.tuna.tsinghua.edu.cnpypi.mirrors.ustc.edu.cnpypi.org

❯ pip config list
freeze.timeout='10'
global.extra-index-url='https://pypi.mirrors.ustc.edu.cn/simple/\nhttps://mirrors.aliyun.com/pypi/simple/\nhttps://pypi.tuna.tsinghua.edu.cn/simple/'
global.index-url='https://mirrors.aliyun.com/pypi/simple'
global.timeout='60'
global.trusted-host='mirrors.aliyun.com'
install.trusted-host='mirrors.aliyun.com\npypi.tuna.tsinghua.edu.cn\npypi.mirrors.ustc.edu.cn'

sudo apt-get remove python3-pip

sudo apt install pipx

pipx install torch --include-deps

❯ ls -l /usr/lib/python3.11/EXTERNALLY-MANAGED
-rw-r--r-- 1 root root 645 2023年 3月13日 /usr/lib/python3.11/EXTERNALLY-MANAGED
❯ sudo mv /usr/lib/python3.11/EXTERNALLY-MANAGED /usr/lib/python3.11/EXTERNALLY-MANAGED.bak

sudo mv /usr/lib/python3.11/EXTERNALLY-MANAGED.bak /usr/lib/python3.11/EXTERNALLY-MANAGED

python3 -m venv  /home/cs/oss/sd/sd-venv

❯ python3 -m venv  ./venv
❯  . ./venv/bin/activate
❯ pip list
Package    Version
---------- -------
pip        23.0.1
setuptools 66.1.1
❯ pip install Flask

python setup.py install --record files.txt 记录安装后文件的路径
cat files.txt | xargs rm -rf 删除这些文件

JAVA_OPTS="-server -XX:NewSize=256m -XX:MaxNewSize=256m -XX:PermSize=512M -XX:MaxPermSize=1024m -Xms2048m -Xmx2048m "

<Executor   name="tomcatThreadPool"
  namePrefix="req-thead-exc"
  maxHttpHeaderSize="8192" 
  maxThreads="1000"
  minSpareThreads="75"
  maxQueueSize="Integer.MAX_VALUE"
  maxIdleTime="60000"
  threadPriority="5"
  className="org.apache.catalina.core.StandardThreadExecutor"
 />

sed -i '/connectionTimeout=/i\  executor="tomcatThreadPool"' /opt/apache/tomcat-8.5.38/conf/server.xml 

<Connector port="8080" protocol="HTTP/1.1" 
  executor="tomcatThreadPool"
  connectionTimeout="20000"   
  redirectPort="8443" />  

sed -i '/^<\/Context>/i\<Resources cachingAllowed="true"  cacheMaxSize="102400" \/>'  /opt/apache/tomcat-8.5.38/conf/context.xml

1.在tomcat——>conf——>servler.xml文件中定义：　　
<Context path="/test" docBase="/test"　　
defaultSessionTimeOut="3600" 
isWARExpanded="true"　　
isWARValidated="false" 
isInvokerEnabled="true"　　
isWorkDirPersistent="false"/> 　　
defaultSessionTimeOut="3600"　　
2. 项目所在目录下的　web.xml中定义：　　
<session-config>　　
<session-timeout>20</session-timeout>　　
</session-config>　　
3. 在程序中定义：　　
session.setMaxInactiveInterval（30*60）；设置单位为秒，设置为-1永不过期

sed -i "s@http://\(deb\|security\).debian.org@https://mirrors.aliyun.com@g" /etc/apt/sources.list


deb https://mirrors.aliyun.com/debian/ bullseye main non-free contrib
deb-src https://mirrors.aliyun.com/debian/ bullseye main non-free contrib
deb https://mirrors.aliyun.com/debian-security/ bullseye-security main
deb-src https://mirrors.aliyun.com/debian-security/ bullseye-security main
deb https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib
deb-src https://mirrors.aliyun.com/debian/ bullseye-updates main non-free contrib
deb https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib
deb-src https://mirrors.aliyun.com/debian/ bullseye-backports main non-free contrib


sudo apt update && sudo apt upgrade  -y

apt-get update			   // 更新源文件，并不会做任何安装升级操作 
apt-get upgrade		       // 升级所有已安装的包 

apt-get install packagename		// 安装指定的包

apt-cache depends packagename   //该包依赖哪些包

apt list --installed

apt-get autoremove packagename --purge  //删除包及其依赖的软件包+配置文件等

apt-get clean 						// 清理无用的包  
apt-get autoclean 					// 清理无用的包  
apt-get check 						// 检查是否有损坏的依赖

cs@debian:~$ sudo apt-mark  hold google-chrome-stable
google-chrome-stable 设置为保留。

echo 'exclude=google-chrome-stable' >> /etc/yum.conf

❯ ls -l /etc/sudoers
-r--r----- 1 root root 689  2月 20 21:59 /etc/sudoers

chmod +w /etc/sudoers

yum install --downloadonly --downloaddir=/mnt  zabbix-agent

# 下载包时,同时下载相关依赖
yumdownloader --resolve --destdir=/apps/yumtmp/downloader php 

> rpm -qa |grep httpd #找到安装的https包
xxxx

##卸载上面命令找到的包
> rpm -e --nodeps  xxx

> a=5 
> b="5"
> print(b+a)
10.0
> print(b-a)
0.0
> print(a==b)
false

tar zxvf mongodb*.tar
mv /opt/mongo*  /opt
cd /opt/mongodb*  && touch  mongodb.conf

dbpath=/home/cs/Download/mongodb/data #数据库路径
logpath=/home/cs/Download/mongodb/data/logs/mongodb.log #日志输出文件路径
logappend=true #错误日志采用追加模式，配置这个选项后mongodb的日志会追加到现有的日志文件，而不是从新创建一个新文件
journal=true #启用日志文件，默认启用
quiet=true #这个选项可以过滤掉一些无用的日志信息，若需要调试使用请设置为false
port=27017 #端口号 默认为27017

cs@debian:/opt/mongodb-3.4.4/bin$ ./mongod  --config  /opt/mongodb-3.4.4/mongodb.conf

mongo  -f   mongo.conf   & 

mongo   --fork  --logpath=log/mongodb.log   

echo   { \
                echo 'dbpath=/data/db'; \
                echo 'port=27017'; \
                echo 'logpath=/data/mongo.log'; \
                echo 'logappend=true'; \
                echo 'fork=true'; \
             } > mongod.conf  

#!/bin/bash
cd /opt/mongodb-3.4.4/bin 
./mongod  --config  /opt/mongodb-3.4.4/mongodb.conf  &
exit
!

E:\MongoDB\Server\bin>mongod.exe --config  E:\MongoDB\mongo.conf

dbpath=E:\MongoDB\data #数据库路径
logpath=E:\MongoDB\logs\mongodb.log #日志输出文件路径
logappend=true #错误日志采用追加模式，配置这个选项后mongodb的日志会追加到现有的日志文件，而不是从新创建一个新文件
journal=true #启用日志文件，默认启用
quiet=true #这个选项可以过滤掉一些无用的日志信息，若需要调试使用请设置为false
port=27017 #端口号 默认为27017