Обновить Readme.md

Reviewed-on: https://gitea.dhaverd.ru/Dhaverd/helpful_snippets/pulls/3

Git/common.md

@@ -0,0 +1,13 @@
+# git common stuff
+
+## change remote url
+
+```bash
+git remote set-url origin <new url>
+```
+
+## remove permission change from git diff
+
+```bash
+git config core.filemode false
+```

Git/stash.md

@@ -0,0 +1,7 @@
+# $git stash
+
+## Stashing 1 file
+
+```bash
+git stash push [-m <message>] [--] [<pathspec>...]
+```

Jujutsu/aliases.md

@@ -0,0 +1,7 @@
+# My Jujutsu aliases
+
+```toml
+[aliases]
+init = ["git", "init", "--colocate"]
+cma = ["commit", "-m"]
+```

Linux/certbot_nginx.md

@@ -0,0 +1,13 @@
+# Certbot renew certificate
+
+## touch nginx config
+
+```bash
+sudo certbot --nginx
+```
+
+## certificate only
+
+```bash
+sudo certbot certonly --nginx
+```

Linux/processes.md

@@ -0,0 +1,41 @@
+# Process interaction snippets
+
+## Find process occupying port
+
+```bash
+ss -lptn 'sport = :5173'
+```
+
+### Output example:
+
+```bash
+State                 Recv-Q                Send-Q                               Local Address:Port                                 Peer Address:Port                Process                                          
+LISTEN                0                     511                                          [::1]:5173                                         [::]:*                    users:(("node",pid=29634,fd=32))
+```
+
+## Kill process
+
+```bash
+sudo kill -[signal] [PID]
+```
+
+### Example:
+
+```bash
+sudo kill -9 29634
+```
+
+### Signals:
+- **SIGTERM (Signal 15).** This signal asks for a process to terminate. The process can capture this signal, perform cleanup operations, and then exit. By default, the kill command sends SIGTERM if no other signal is specified.
+
+- **SIGKILL (Signal 9).** It forcefully kills a process. The process cannot capture or ignore this signal, which results in an immediate termination. It should be used as a last resort when a process doesn’t respond to SIGTERM.
+
+- **SIGINT (Signal 2).** This is typically sent when you press Ctrl + C in the terminal. It interrupts a process and is usually used to stop a process running in the foreground.
+
+- **SIGHUP (Signal 1).** Sent to a process when its controlling terminal is closed and often used to reload configuration files.
+
+- **SIGQUIT (Signal 3).** Causes a process to terminate and produce a core dump file for debugging.
+
+- **SIGSTOP (Signal 19).** Pauses a process without killing it, similar to pressing Ctrl + Z in the terminal.
+
+- **SIGCONT (Signal 18).** Continues a process that was stopped by SIGSTOP or Ctrl + Z.

Linux/users.md

@@ -0,0 +1,12 @@
+# Popular Linux user actions
+
+## Add nologin, no home user (for running services)
+
+```bash
+useradd --no-create-home --shell /usr/sbin/nologin user_name
+```
+
+## Add user in group
+```bash
+usermod -aG group_name user_name
+```

MySQL/all_foreign_keys_to_table_or_column.md

@@ -1,9 +1,8 @@
 # Find all tables whose foreign key refers to the table/column
-[SQL File](./src/branch/master/MySQL/sql/all_foreign_keys_to_table_or_column.sql)
 
 ## By table
 
-```
+```SQL
 SELECT 
   TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME
 FROM
@@ -15,7 +14,7 @@ WHERE
 
 ## By table column
 
-```
+```SQL
 SELECT 
   TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAME
 FROM

MySQL/identify_lock.md

@@ -2,13 +2,13 @@
 
 ## Method 1
 
-```
+```SQL
 SHOW open tables WHERE In_use > 0;
 ```
 
 ## Method 2
 
-```
+```SQL
 SELECT
     OBJECT_SCHEMA, 
     OBJECT_NAME, 
@@ -24,6 +24,6 @@ GROUP BY
 
 ## Process list
 
-```
+```SQL
 SHOW PROCESSLIST;
 ```

MySQL/users.md

@@ -0,0 +1,101 @@
+# MySQL users actions
+
+## Show users with hosts
+
+```SQL
+SELECT User, Host FROM mysql.user;
+```
+
+## Check user privileges
+
+```SQL
+SHOW GRANTS FOR 'someuser'@'somehost.somedomain';
+```
+
+## Create user
+
+```SQL
+CREATE USER 'some_user'@'somehost.somedomain' IDENTIFIED BY 'some_password';
+FLUSH PRIVILEGES;
+```
+
+## Delete user
+
+```SQL
+DROP USER 'some_user'@'somehost.somedomain';
+FLUSH PRIVILEGES;
+```
+
+## Granting privileges
+
+### Grant all privileges
+
+```SQL
+GRANT ALL PRIVILEGES ON *.* TO 'some_user'@'somehost.somedomain' WITH GRANT OPTION;
+FLUSH PRIVILEGES;
+```
+
+### Grant privilege on database 'some_db'
+
+```SQL
+GRANT SELECT ON `some_db`.* TO 'some_user'@'somehost.somedomain';
+FLUSH PRIVILEGES;
+```
+
+### Grant privilege on table 'some_db'.'some_table'
+
+```SQL
+GRANT SELECT ON `some_db`.'some_table' TO 'some_user'@'somehost.somedomain';
+FLUSH PRIVILEGES;
+```
+
+### Grant privilege to select and update some columns on table 'some_db'.'some_table'
+
+```SQL
+GRANT SELECT (id, some_column), UPDATE (some_column) ON `some_db`.`some_table` TO 'some_user'@'somehost.somedomain';
+```
+
+### Grant with inheritance
+
+```SQL
+GRANT SELECT, INSERT, UPDATE, DELETE ON `some_db`.* TO 'some_user'@'somehost' WITH GRANT OPTION;
+FLUSH PRIVILEGES;
+```
+
+**'WITH GRANT OPTION'** makes it possible to convey to others what is permitted to oneself.
+
+## Revoking privileges
+
+### Revoke privilege to select from database 'somedb'
+
+```SQL
+REVOKE SELECT ON `somedb`.* FROM 'someuser'@'somehost';
+FLUSH PRIVILEGES;
+```
+
+### Revoke all privileges from user
+
+```SQL
+ALL PRIVILEGES ON *.* FROM 'someuser'@'somehost';
+FLUSH PRIVILEGES;
+```
+
+### Revoke all privileges to database 'somedb' from user
+
+```SQL
+ALL PRIVILEGES ON `somedb`.* FROM 'someuser'@'somehost';
+FLUSH PRIVILEGES;
+```
+
+### Revoke all privileges from user
+
+```SQL
+REVOKE ALL PRIVILEGES, GRANT OPTION FROM 'someuser'@'somehost';
+FLUSH PRIVILEGES;
+```
+
+## Change password
+
+```SQL
+ALTER USER 'test_user'@'localhost' IDENTIFIED BY 'new_password';
+```

Readme.md

@@ -4,6 +4,18 @@ This is a repository with useful snippets of various kinds of code
 
 ## Structure
 
+- [Git](./src/branch/master/Git/)
+- - [stash](./src/branch/master/Git/stash.md)
+- - [common](./src/branch/master/Git/common.md)
+- [Jujutsu](./src/branch/master/Jujutsu/)
+- - [aliases](./src/branch/master/Jujutsu/aliases.md)
+- [Linux](./src/branch/master/Linux/)
+- - [certbot_nginx](./src/branch/master/Linux/certbot_nginx.md)
+- - [processes](./src/branch/master/Linux/processes.md)
+- - [users](./src/branch/master/Linux/users.md)
 - [MySQL](./src/branch/master/MySQL)
 - - [all_foreign_keys_to_table_or_column](./src/branch/master/MySQL/all_foreign_keys_to_table_or_column.md)
-- - [identify_lock](./src/branch/master/MySQL/identify_lock.md)
+- - [identify_lock](./src/branch/master/MySQL/identify_lock.md)
+- - [users](./src/branch/master/MySQL/users.md)
+- [Windows](./src/branch/master/Windows)
+- - [copy_as_another_user](./src/branch/master/Windows/copy_as_another_user.md)

Windows/copy_as_another_user.md

@@ -0,0 +1,10 @@
+# Copy files or do smth as another user in CMD/Powershell
+
+```cmd
+net use x: "\\shared\destination\" /user:domain\user password
+
+:: Copy or do whay you need
+copy "source destination" "\\shared\destination\target"
+
+net use x: /d
+```