hbase启动后自动关闭
hadoop namemode日志显示
```
2023-04-12 00:50:38,889 WARN org.apache.hadoop.hdfs.server.namenode.NameNodeResourceChecker: Space available on volume '/dev/mapper/ubuntu--vg-ubuntu--lv' is 67026944, which is below the configured reserved amount 104857600
2023-04-12 00:50:38,890 WARN org.apache.hadoop.hdfs.server.namenode.FSNamesystem: NameNode low on available disk space. Already in safe mode.
```
执行
`hdfs dfsadmin -safemode leave`

hbase 关闭安全模式

```c++
setAttribute(Qt::WA_TranslucentBackground);
    setWindowFlags(Qt::FramelessWindowHint);

QPalette palette = QPalette();
    palette.setColor(QPalette::Background, QColor(0x00,0xFF,0x00,0x00));
setPalette(palette);
```

qt设置背景透明但子控件不透明

众所周知，有些源会过期，导致我们升级的时候很难受。
以删除yarn Packaging 为例
删除方法：
```
momen@momen-PC:~$ sudo apt-key list
/etc/apt/trusted.gpg
--------------------

....

pub   rsa4096 2016-10-05 [SC]
      72EC F46A 56B4 AD39 C907  BBB7 1646 B01B 86E5 0310
uid           [ 未知 ] Yarn Packaging <yarn@dan.cx>
sub   rsa4096 2016-10-05 [E]

.....

/etc/apt/trusted.gpg.d/debian-archive-bullseye-automatic.gpg
........`
```
`sudo apt-key del 72ECF46A56B4AD39C907BBB71646B01B86E50310`

---

删除gpg
```bash
有 8 个软件包可以升级。请执行 ‘apt list --upgradable’ 来查看它们。
W: 校验数字签名时出错。此仓库未被更新，所以仍然使用此前的索引文件。GPG 错误：https://dl.yarnpkg.com/debian stable InRelease: 下列签名无效： EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
W: 无法下载 https://dl.yarnpkg.com/debian/dists/stable/InRelease  下列签名无效： EXPKEYSIG 23E7166788B63E1E Yarn Packaging <yarn@dan.cx>
W: 部分索引文件下载失败。如果忽略它们，那将转而使用旧的索引文件。
```
```
momen@momen-PC:~$ sudo apt-key adv --recv-keys 23E7166788B63E1E
Executing: /tmp/apt-key-gpghome.lHHtgSUDcP/gpg.1.sh --recv-keys 23E7166788B63E1E
gpg: 密钥 1646B01B86E50310：公钥 “Yarn Packaging <yarn@dan.cx>” 已导入
gpg: 处理的总数：1
gpg:               已导入：1
momen@momen-PC:~$
```

删除讨厌的源！((删除gpg或没有公钥的源)

bbr:
`wget -N --no-check-certificate "https://raw.githubusercontent.com/chiakge/Linux-NetSpeed/master/tcp.sh" && chmod +x tcp.sh && ./tcp.sh`
v2ray:
自动：
`bash <(curl -s -L https://raw.githubusercontent.com/xyz690/v2ray/master/go.sh)`
手动:
`bash <(curl -s -L https://raw.githubusercontent.com/xyz690/v2ray/master/install.sh)`
`bash <(curl -sL https://raw.githubusercontent.com/hiifeng/v2ray/main/install_v2ray.sh)`
x-ui面板：
`bash <(curl -Ls https://raw.githubusercontent.com/vaxilu/x-ui/master/install.sh)`

上网咯

`sudo apt install rdesktop`
rdesktop -f 192.168.33.134
```
➜ ~ ➤ rdesktop --help
rdesktop：无效选项 -- -
rdesktop: A Remote Desktop Protocol client.
Version 1.7.1. Copyright (C) 1999-2011 Matthew Chapman et al.
See http://www.rdesktop.org/ for more information.

Usage: rdesktop [options] server[:port]
   -u: user name
   -d: domain
   -s: shell
   -c: working directory
   -p: password (- to prompt)
   -n: client hostname
   -k: keyboard layout on server (en-us, de, sv, etc.)
   -g: desktop geometry (WxH)
   -f: full-screen mode
   -b: force bitmap updates
   -L: local codepage
   -A: enable SeamlessRDP mode
   -B: use BackingStore of X-server (if available)
   -e: disable encryption (French TS)
   -E: disable encryption from client to server
   -m: do not send motion events
   -C: use private colour map
   -D: hide window manager decorations
   -K: keep window manager key bindings
   -S: caption button size (single application mode)
   -T: window title
   -N: enable numlock syncronization
   -X: embed into another window with a given id.
   -a: connection colour depth
   -z: enable rdp compression
   -x: RDP5 experience (m[odem 28.8], b[roadband], l[an] or hex nr.)
   -P: use persistent bitmap caching
   -r: enable specified device redirection (this flag can be repeated)
         '-r comport:COM1=/dev/ttyS0': enable serial redirection of /dev/ttyS0 to COM1
             or      COM1=/dev/ttyS0,COM2=/dev/ttyS1
         '-r disk:floppy=/mnt/floppy': enable redirection of /mnt/floppy to 'floppy' share
             or   'floppy=/mnt/floppy,cdrom=/mnt/cdrom'
         '-r clientname=<client name>': Set the client name displayed
             for redirected disks
         '-r lptport:LPT1=/dev/lp0': enable parallel redirection of /dev/lp0 to LPT1
             or      LPT1=/dev/lp0,LPT2=/dev/lp1
         '-r printer:mydeskjet': enable printer redirection
             or      mydeskjet="HP LaserJet IIIP" to enter server driver as well
         '-r sound:[local[:driver[:device]]|off|remote]': enable sound redirection
                     remote would leave sound on server
                     available drivers for 'local':
                     alsa:  ALSA output driver, default device: default
         '-r clipboard:[off|PRIMARYCLIPBOARD|CLIPBOARD]': enable clipboard
                      redirection.
                      'PRIMARYCLIPBOARD' looks at both PRIMARY and CLIPBOARD
                      when sending data to server.
                      'CLIPBOARD' looks at only CLIPBOARD.
         '-r scard[:"Scard Name"="Alias Name[;Vendor Name]"[,...]]
          example: -r scard:"eToken PRO 00 00"="AKS ifdh 0"
                   "eToken PRO 00 00" -> Device in Linux/Unix enviroment
                   "AKS ifdh 0"       -> Device shown in Windows enviroment 
          example: -r scard:"eToken PRO 00 00"="AKS ifdh 0;AKS"
                   "eToken PRO 00 00" -> Device in Linux/Unix enviroment
                   "AKS ifdh 0"       -> Device shown in Windows enviroment 
                   "AKS"              -> Device vendor name                 
   -0: attach to console
   -4: use RDP version 4
   -5: use RDP version 5 (default)
➜ ~ ➤```