[root@gitlab ~]$gitlab-rake gitlab:backup:create ... Warning: Your gitlab.rb and gitlab-secrets.json files contain sensitive data and are not included in this backup. You will need these files to restore a backup. Please back them up manually.
Consumer:消费者,每个 consumer 属于一个特定的 consuer group(若不指定 group name 则属于默认 group),使用 consumer high level API 时,同一 topic 的一条消息只能被同一个 consumer group内的一个 consumer 消费,但多个 consumer group 可同时消费这一消息
[root@kakfa1 bin]$./kafka-topics.sh --delete \ --topic lujinkai \ --zookeeper zk1.ljk.cn:2181 Topic lujinkai is marked for deletion. Note: This will have no impact if delete.topic.enable is not set to true.
[root@zabbix src]$which rabbitmq-plugins /usr/sbin/rabbitmq-plugins [root@zabbix src]$rabbitmq-plugins enable rabbitmq_management Enabling plugins on node rabbit@mq1: rabbitmq_management The following plugins have been configured: rabbitmq_management rabbitmq_management_agent rabbitmq_web_dispatch Applying plugin configuration to rabbit@mq1... The following plugins have been enabled: rabbitmq_management rabbitmq_management_agent rabbitmq_web_dispatch
[root@mq1 ~]$rabbitmqctl add_user ljk 123456 # 添加用户 Adding user "ljk" ... Done. Don't forget to grant the user permissions to some virtual hosts! See 'rabbitmqctl help set_permissions' to learn more. [root@mq1 ~]$rabbitmqctl set_user_tags ljk administrator # 用户授权 Setting tags for user "ljk" to [administrator] ... [root@mq1 ~]$rabbitmqctl list_users Listing users ... user tags ljk [administrator] # 授权成功 guest [administrator]
[root@mq1 ~]$rabbitmqctl delete_vhost test Deleting vhost "test" ...
添加账户 jack 密码为 123456
1 2 3
[root@mq1 ~]$rabbitmqctl add_user jack 123456 Adding user "jack" ... Done. Don't forget to grant the user permissions to some virtual hosts! See 'rabbitmqctl help set_permissions' to learn more.
更改用户密码
1 2
[root@mq1 ~]$rabbitmqctl change_password jack 654321 Changing password for user "jack" ...
设置 jack 用户对 test 的 vhost 有读写权限,三个点为配置正则、读和写
1
[root@mq1 ~]$rabbitmqctl set_permissions -p test jack ".*"".*"".*"
data = obj.stdout.read() data1 = eval(data) for i in data1: if i.get("running") == "true": running_list.append(i.get("name")) else: error_list.append(i.get("name"))
[root@provider1 dubbo-demo-provider-2.1.5]$tail -f logs/stdout.log # 查看日志 Java HotSpot(TM) 64-Bit Server VM warning: ignoring option PermSize=128m; support was removed in 8.0 Java HotSpot(TM) 64-Bit Server VM warning: UseCMSCompactAtFullCollection is deprecated and will likely be removed in a future release. log4j:WARN No appenders could be found for logger (com.alibaba.dubbo.common.logger.LoggerFactory). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. [2021-02-23 13:25:48] Dubbo service server started! # 启动成功
[root@mysql-master ~]$mysql -uroot -p # 创建 zabbix_server 数据库 mysql> create database zabbix_server character set utf8 collate utf8_bin; # 创建 zabbix_server 用户 mysql> create user zabbix_server@'10.0.%.%' identified by '123456'; mysql> grant all privileges on zabbix_server.* to zabbix_server@'10.0.%.%';
Database type MySQL Database server 10.0.1.24 Database port 3306 Database name zabbix_server Database user zabbix_server Database password 123456 Zabbix server 10.0.1.21 # ip 和 主机名 均可 Zabbix server port 10051 Zabbix server name zabbix_server # 这里随便写
[root@web1 data]$echo -e "stats\nquit" | nc 127.0.0.1 11211 STAT pid 5590 STAT uptime 725 STAT time 1613618905 STAT version 1.5.6 Ubuntu STAT libevent 2.1.8-stable STAT pointer_size 64 STAT rusage_user 0.072870 STAT rusage_system 0.048580 STAT max_connections 1024 STAT curr_connections 1 STAT total_connections 4 STAT rejected_connections 0 STAT connection_structures 2 STAT reserved_fds 20 STAT cmd_get 0 STAT cmd_set 0 STAT cmd_flush 0 STAT cmd_touch 0 STAT get_hits 0 STAT get_misses 0 STAT get_expired 0 STAT get_flushed 0 STAT delete_misses 0 STAT delete_hits 0 STAT incr_misses 0 STAT incr_hits 0 STAT decr_misses 0 STAT decr_hits 0 STAT cas_misses 0 STAT cas_hits 0 STAT cas_badval 0 STAT touch_hits 0 STAT touch_misses 0 STAT auth_cmds 0 STAT auth_errors 0 STAT bytes_read 35 STAT bytes_written 3795 STAT limit_maxbytes 67108864 STAT accepting_conns 1 STAT listen_disabled_num 0 STAT time_in_listen_disabled_us 0 STAT threads 4 STAT conn_yields 0 STAT hash_power_level 16 STAT hash_bytes 524288 STAT hash_is_expanding 0 STAT slab_reassign_rescues 0 STAT slab_reassign_chunk_rescues 0 STAT slab_reassign_evictions_nomem 0 STAT slab_reassign_inline_reclaim 0 STAT slab_reassign_busy_items 0 STAT slab_reassign_busy_deletes 0 STAT slab_reassign_running 0 STAT slabs_moved 0 STAT lru_crawler_running 0 STAT lru_crawler_starts 1275 STAT lru_maintainer_juggles 774 STAT malloc_fails 0 STAT log_worker_dropped 0 STAT log_worker_written 0 STAT log_watcher_skipped 0 STAT log_watcher_sent 0 STAT bytes 0 STAT curr_items 0 STAT total_items 0 STAT slab_global_page_pool 0 STAT expired_unfetched 0 STAT evicted_unfetched 0 STAT evicted_active 0 STAT evictions 0 STAT reclaimed 0 STAT crawler_reclaimed 0 STAT crawler_items_checked 0 STAT lrutail_reflocked 0 STAT moves_to_cold 0 STAT moves_to_warm 0 STAT moves_within_lru 0 STAT direct_reclaims 0 STAT lru_bumps_dropped 0 END
3、一个linux用户给root发邮件,要求邮件标题为”help”,邮件正文如下: Hello, I am 用户名,The system version is here,please help me to check it ,thanks! 操作系统版本信息
1
[root@centos8 ~]# echo -e "Hello, I am `whoami`,The system version is here,please help me to check it ,thanks! \n`cat /etc/os-release`" | mail -s hello root
4、将/root/下文件列表,显示成一行,并文件名之间用空格隔开
1
[root@4710419222 /]# ls -A /root | tr '\n' ' '
5、计算1+2+3+…+99+100的总和
1 2
[root@centos8 test]# seq -s + 1 100 | bc 5050
6、删除Windows文本文件中的回车字符 ,即“\r”
1
cat a.log | tr '\r'' '
7、处理字符串“xt.,l 1 jr#!$mn 2 c*/fe 3 uz 4”,只保留其中的数字和空格
-h, --help Print this message and exit -v, --version Print the version information and exit --md5 Use MD5 to encrypt the password --sha-256 Use SHA-256 to encrypt the password --sha-512 Use SHA-512 to encrypt the password (default)
Report bugs to <bug-grub@gnu.org>. EOF [root@centos6 ~]# grub-crypt Password: Retype password: $6$O4ufCj1vTKW/7Ko7$p9rV3m0dsEsr0ebCyOVN.togh1fVhQCCDBsoc.RkelfWnRrIm3W5vVPuB86oOKo1Yei0QKxO2MRMoX2qzHV7M1 [root@centos6 ~]# useradd -p '$6$O4ufCj1vTKW/7Ko7$p9rV3m0dsEsr0ebCyOVN.togh1fVhQCCDBsoc.RkelfWnRrIm3W5vVPuB86oOKo1Yei0QKxO2MRMoX2qzHV7M1' test [root@centos6 ~]# getent shadow test test:$6$O4ufCj1vTKW/7Ko7$p9rV3m0dsEsr0ebCyOVN.togh1fVhQCCDBsoc.RkelfWnRrIm3W5vVPuB86oOKo1Yei0QKxO2MRMoX2qzHV7M1:18475:0:99999:7:::