Системный Администратор (Сисадмин)
Настройка серверов Windows, Linux, сетевое оборудование Cisco Systems, D-Link, HP, Huawei, Juniper, MikroTik. Книги и мануалы для сисадминов. По всем вопросам @evgenycarter РКН clck.ru/3KoGJ3
Show more📈 Analytical overview of Telegram channel Системный Администратор (Сисадмин)
Channel Системный Администратор (Сисадмин) (@sysadminof) in the Russian language segment is an active participant. Currently, the community unites 14 260 subscribers, ranking 8 960 in the Technologies & Applications category and 45 486 in the Russia region.
📊 Audience metrics and dynamics
Since its creation on невідомо, the project has demonstrated rapid growth, gathering an audience of 14 260 subscribers.
According to the latest data from 11 November, 2026, the channel demonstrates stable activity. Although there has been a change in the number of participants by -28 over the last 30 days and by -11 over the last 24 hours, overall reach remains high.
- Verification status: Not verified
- Engagement rate (ER): The average audience engagement rate is 12.23%. Within the first 24 hours after publication, content typically collects 4.99% reactions from the total number of subscribers.
- Post reach: On average, each post receives 1 744 views. Within the first day, a publication typically gains 712 views.
- Reactions and interaction: The audience actively supports content: the average number of reactions per post is 9.
- Thematic interests: Content is focused on key topics such as zfspool, диск, linux, пул, zpool.
📝 Description and content policy
The author describes the resource as a platform for expressing subjective opinions:
“Настройка серверов Windows, Linux, сетевое оборудование Cisco Systems, D-Link, HP, Huawei, Juniper, MikroTik. Книги и мануалы для сисадминов.
По всем вопросам @evgenycarter
РКН clck.ru/3KoGJ3”
Thanks to the high frequency of updates (latest data received on 12 November, 2026), the channel maintains relevance and a high level of publication reach. Analytics show that the audience actively interacts with content, making it an important point of influence in the Technologies & Applications category.
$long_query_time = 1
$log-slow-queries = /var/log/mysql/mysql-slow-query.log
Строка 1 означает, что любой запрос, длящийся более 1 секунды, будет занесен в лог. По умолчанию, параметр установлен в «0». После внесения данного изменения, сервер необходимо перезапустить, чтобы изменения вступили в силу.
Теперь, когда вы имеете возможность выявлять «долгие» запросы, используйте команду EXPLAIN, которая была обсуждена ранее, чтобы выяснить, почему это происходит.
#MySQL
👉 @database_infoCREATE TABLE test (
id INTEGER,
txt VARCHAR(20),
ts1 TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
ts2 TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
);
Copy Database
mysqldump -u root -p db1 > dump.sql
mysqladmin -u root -p create db2
mysql -u root -p db2 < dump.sql
Create User
mysql> grant all privileges on DBNAME.* to USERNAME@localhost identified by 'PASSWORD';
mysql> grant all privileges on DBNAME.* to USERNAME@"%" identified by 'PASSWORD';
mysql> flush privileges;
--all DB
mysql> grant all privileges on *.* to USERNAME@localhost identified by 'PASSWORD';
mysql> grant all privileges on *.* to USERNAME@"%" identified by 'PASSWORD';
mysql> flush privileges;
Delete User
mysql> drop user USERNAME;
or
mysql> delete from mysql.user where user = 'USERNAME';
Change Password
--User
mysql> set password for USER@"%" = password('PASSWORD');
mysql> set password for USER@localhost = password('PASSWORD');
--root
mysql> set password for root=password('PASSWORD');
mysql> set password for root@localhost=password('PASSWORD');
CSV Import / Export
ERROR 1045 (28000) at line 1: Access denied for user 'USER'@'localhost' (using password: YES)
mysql> grant file on *.* to USER@localhost;
Tips
--Create table as same data and type
mysql> create table newtable as select * from orgtable;
--Create table with same type. data is null.
mysql> create table newtable as select * from orgtable where id is null;
Export to CSV
# mysql -uUSER -pPASS DATABASE -e "select * from TABLE;" | sed -e 's/^/"/g' | sed -e 's/$/"/g' | sed -e 's/\t/","/g' > /tmp/test.csv
#MySQL
👉 @database_infonetstat -r
Проверяем, какие порты и чем заняты:
netstat -atupn
Список открытых портов TCP
netstat -at
Список открытых портов UDP
netstat -au
Статистика сетевых интерфейсов
netstat -i
👉@sysadminof