Ubuntu

KDE neon live镜像用户密码修改

May 11, 2025

KDE Neon live镜像默认用户名为neon，密码为空。 但超时锁屏后，neon用户无法使用空密码登录。 这时候可以使用Alt+F3切换sesseion，在cli模式下用空密码登录neon账号，然后使用passwd neon修改密码。 …

修复NO_PUBKEY方法

May 19, 2023

apt-update时提示如下证书不可用错误： The following signatures couldn't be verified because the public key is not available: NO_PUBKEY AA8E81B4331F7F50 NO_PUBKEY 112695A0E562B32A 解决方法如下： apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F42ED6FBAB17C654 把所有提示NO_PUBKEY后的都添加一遍即可。 …

Linux下复制文件/目录实例

Apr 07, 2023

拷贝文件到目录 cp sourcefile diectory 以下示例将sfile.dat文件复制到desdir目录下： alair@e64 MINGW64 ~/Documents/example $ cp sfile.dat desdir/ alair@e64 MINGW64 ~/Documents/example $ ls desdir/ sfile.dat 拷贝并重命名文件 cp sourcefile sourcefile_copy 以下示例将sfile.dat文件复制并重命名为sfile_copy.dat文件： …

Ubuntu 22.04 GRUB开启os-prober多系统检测

Jan 16, 2022

安装os-prober sudo apt install os-prober 设置GRUB，编辑/etc/default/grub sudo vi /etc/default/grub 添加如下行，完成后保存运行sudo update-grub即可。 …

Ubuntu21.04安装Gnome40

Apr 25, 2021

ubuntu21.04可以通过PPA源的方法安装gnome40，方法如下： sudo add-apt-repository ppa:shemgp/gnome-40 #添加PPA源 sudo apt install mutter gnome-shell sudo apt upgrade 安装完成后重启系统，在会话选择中选择GNOME即可进入。 …

JingOS试用体验

Mar 17, 2021

JingOS-全球首个基于ARM架构，专为平板打造的Linux。 此次为虚拟机安装试用体验，虚拟机配置如下： LiveCD系统体验 磁盘检查&引导加载 欢迎界面 …

斐讯N1系统信息和UNIXBENCH跑分

Mar 02, 2020

系统信息 alair@aml:~ $ inxi -F System: Host: aml Kernel: 5.5.0-rc6-aml-s9xxx aarch64 bits: 32 Console: tty 0 Distro: Ubuntu 18.04.4 LTS Machine: No /sys/class/dmi; using dmidecode: dmidecode is not installed. CPU: Quad core ARMv8 rev 4 (v8l) (-MCP-) (ARM) clock speeds: max: 1512 MHz 1: 1512 MHz 2: 1512 MHz 3: 1512 MHz 4: 1512 MHz Graphics: Card: Failed to Detect Video Card! Display Server: N/A driver: N/A tty size: 254x72 Advanced Data: N/A out of X Audio: Card AMLGX driver: AMLGX Sound: ALSA v: k5.5.0-rc6-aml-s9xxx Network: Card: Failed to Detect Network Card! Drives: HDD Total Size: NA (-) ID-1: /dev/mmcblk1 model: N/A size: 7.8GB Partition: ID-1: / size: 6.3G used: 4.8G (76%) fs: ext4 dev: /dev/mmcblk1p2 ID-2: /boot size: 244M used: 77M (32%) fs: vfat dev: /dev/mmcblk1p1 ID-3: /var/log size: 49M used: 2.5M (6%) fs: ext4 dev: /dev/zram0 ID-4: swap-1 size: 0.91GB used: 0.00GB (0%) fs: swap dev: /dev/zram1 Sensors: None detected - is lm-sensors installed and configured? Info: Processes: 155 Uptime: 2:39 Memory: 306.4/1741.2MB Init: systemd runlevel: 5 Client: Shell (zsh) inxi: 2.3.56 Unixbench分数 alair@aml:~/unixbench-5.1.2 $ ./Run make all make[1]: Entering directory '/home/alair/unixbench-5.1.2' Checking distribution of files ./pgms exists ./src exists ./testdir exists ./tmp exists ./results exists make[1]: Leaving directory '/home/alair/unixbench-5.1.2' sh: 1: 3dinfo: not found # # # # # # # ##### ###### # # #### # # # # ## # # # # # # # ## # # # # # # # # # # # ## ##### ##### # # # # ###### # # # # # # ## # # # # # # # # # # # # ## # # # # # # # ## # # # # #### # # # # # ##### ###### # # #### # # Version 5.1.2 Based on the Byte Magazine Unix Benchmark Multi-CPU version Version 5 revisions by Ian Smith, Sunnyvale, CA, USA December 22, 2007 johantheghost at yahoo period com Wide character in print at ./Run line 1510. Wide character in printf at ./Run line 1541. Use of uninitialized value in printf at ./Run line 1378. Use of uninitialized value in printf at ./Run line 1379. Use of uninitialized value in printf at ./Run line 1378. Use of uninitialized value in printf at ./Run line 1379. Use of uninitialized value in printf at ./Run line 1378. Use of uninitialized value in printf at ./Run line 1379. Use of uninitialized value in printf at ./Run line 1378. Use of uninitialized value in printf at ./Run line 1379. Use of uninitialized value in printf at ./Run line 1588. Use of uninitialized value in printf at ./Run line 1589. Use of uninitialized value in printf at ./Run line 1588. Use of uninitialized value in printf at ./Run line 1589. Use of uninitialized value in printf at ./Run line 1588. Use of uninitialized value in printf at ./Run line 1589. Use of uninitialized value in printf at ./Run line 1588. Use of uninitialized value in printf at ./Run line 1589. 1 x Dhrystone 2 using register variables 1 2 3 4 5 6 7 8 9 10 1 x Double-Precision Whetstone 1 2 3 4 5 6 7 8 9 10 1 x Execl Throughput 1 2 3 1 x File Copy 1024 bufsize 2000 maxblocks 1 2 3 1 x File Copy 256 bufsize 500 maxblocks 1 2 3 1 x File Copy 4096 bufsize 8000 maxblocks 1 2 3 1 x Pipe Throughput 1 2 3 4 5 6 7 8 9 10 1 x Pipe-based Context Switching 1 2 3 4 5 6 7 8 9 10 1 x Process Creation 1 2 3 1 x System Call Overhead 1 2 3 4 5 6 7 8 9 10 1 x Shell Scripts (1 concurrent) 1 2 3 1 x Shell Scripts (8 concurrent) 1 2 3 Wide character in printf at ./Run line 1483. 4 x Dhrystone 2 using register variables 1 2 3 4 5 6 7 8 9 10 4 x Double-Precision Whetstone 1 2 3 4 5 6 7 8 9 10 4 x Execl Throughput 1 2 3 4 x File Copy 1024 bufsize 2000 maxblocks 1 2 3 4 x File Copy 256 bufsize 500 maxblocks 1 2 3 4 x File Copy 4096 bufsize 8000 maxblocks 1 2 3 4 x Pipe Throughput 1 2 3 4 5 6 7 8 9 10 4 x Pipe-based Context Switching 1 2 3 4 5 6 7 8 9 10 4 x Process Creation 1 2 3 4 x System Call Overhead 1 2 3 4 5 6 7 8 9 10 4 x Shell Scripts (1 concurrent) 1 2 3 4 x Shell Scripts (8 concurrent) 1 2 3 Wide character in printf at ./Run line 1483. ======================================================================== BYTE UNIX Benchmarks (Version 5.1.2) System: aml: GNU/Linux OS: GNU/Linux -- 5.5.0-rc6-aml-s9xxx -- #rc1.037 SMP PREEMPT Wed Feb 5 17:28:41 MSK 2020 Machine: aarch64 (aarch64) Language: en_US.utf8 (charmap="UTF-8", collate="UTF-8") CPU 0: ARMv8 Processor rev 4 (v8l) (0.0 bogomips) CPU 1: ARMv8 Processor rev 4 (v8l) (0.0 bogomips) CPU 2: ARMv8 Processor rev 4 (v8l) (0.0 bogomips) CPU 3: ARMv8 Processor rev 4 (v8l) (0.0 bogomips) 19:35:59 up 2:44, 1 user, load average: 2.13, 2.07, 2.01; runlevel 5 ------------------------------------------------------------------------ Benchmark Run: 一 3月 02 2020 19:35:59 - 20:03:58 4 CPUs in system; running 1 parallel copy of tests Dhrystone 2 using register variables 6888588.0 lps (10.0 s, 7 samples) Double-Precision Whetstone 1373.9 MWIPS (9.8 s, 7 samples) Execl Throughput 877.5 lps (30.0 s, 2 samples) File Copy 1024 bufsize 2000 maxblocks 168765.4 KBps (30.0 s, 2 samples) File Copy 256 bufsize 500 maxblocks 49199.4 KBps (30.0 s, 2 samples) File Copy 4096 bufsize 8000 maxblocks 445012.9 KBps (30.0 s, 2 samples) Pipe Throughput 327924.7 lps (10.0 s, 7 samples) Pipe-based Context Switching 69606.2 lps (10.0 s, 7 samples) Process Creation 2416.8 lps (30.0 s, 2 samples) Shell Scripts (1 concurrent) 2283.5 lpm (60.0 s, 2 samples) Shell Scripts (8 concurrent) 656.5 lpm (60.0 s, 2 samples) System Call Overhead 632162.6 lps (10.0 s, 7 samples) System Benchmarks Index Values BASELINE RESULT INDEX Dhrystone 2 using register variables 116700.0 6888588.0 590.3 Double-Precision Whetstone 55.0 1373.9 249.8 Execl Throughput 43.0 877.5 204.1 File Copy 1024 bufsize 2000 maxblocks 3960.0 168765.4 426.2 File Copy 256 bufsize 500 maxblocks 1655.0 49199.4 297.3 File Copy 4096 bufsize 8000 maxblocks 5800.0 445012.9 767.3 Pipe Throughput 12440.0 327924.7 263.6 Pipe-based Context Switching 4000.0 69606.2 174.0 Process Creation 126.0 2416.8 191.8 Shell Scripts (1 concurrent) 42.4 2283.5 538.6 Shell Scripts (8 concurrent) 6.0 656.5 1094.1 System Call Overhead 15000.0 632162.6 421.4 ======== System Benchmarks Index Score 369.1 ------------------------------------------------------------------------ Benchmark Run: 一 3月 02 2020 20:03:58 - 20:32:08 4 CPUs in system; running 4 parallel copies of tests Dhrystone 2 using register variables 26826718.3 lps (10.0 s, 7 samples) Double-Precision Whetstone 5449.1 MWIPS (9.8 s, 7 samples) Execl Throughput 2965.8 lps (30.0 s, 2 samples) File Copy 1024 bufsize 2000 maxblocks 291243.4 KBps (30.0 s, 2 samples) File Copy 256 bufsize 500 maxblocks 80902.5 KBps (30.0 s, 2 samples) File Copy 4096 bufsize 8000 maxblocks 827300.0 KBps (30.0 s, 2 samples) Pipe Throughput 1252522.5 lps (10.0 s, 7 samples) Pipe-based Context Switching 217969.4 lps (10.0 s, 7 samples) Process Creation 6193.8 lps (30.0 s, 2 samples) Shell Scripts (1 concurrent) 5216.1 lpm (60.0 s, 2 samples) Shell Scripts (8 concurrent) 701.8 lpm (60.1 s, 2 samples) System Call Overhead 2375324.0 lps (10.0 s, 7 samples) System Benchmarks Index Values BASELINE RESULT INDEX Dhrystone 2 using register variables 116700.0 26826718.3 2298.8 Double-Precision Whetstone 55.0 5449.1 990.7 Execl Throughput 43.0 2965.8 689.7 File Copy 1024 bufsize 2000 maxblocks 3960.0 291243.4 735.5 File Copy 256 bufsize 500 maxblocks 1655.0 80902.5 488.8 File Copy 4096 bufsize 8000 maxblocks 5800.0 827300.0 1426.4 Pipe Throughput 12440.0 1252522.5 1006.9 Pipe-based Context Switching 4000.0 217969.4 544.9 Process Creation 126.0 6193.8 491.6 Shell Scripts (1 concurrent) 42.4 5216.1 1230.2 Shell Scripts (8 concurrent) 6.0 701.8 1169.6 System Call Overhead 15000.0 2375324.0 1583.5 ======== System Benchmarks Index Score 943.1

在Linux中安装Windows字体

Nov 21, 2019

在Linux中安装Windows字体 使用的系统为xubuntu 25.04，Windows11系统分区lable为sys 参考如下操作： # 新建字体目录 alair@e6440:~$ sudo mkdir /usr/share/fonts/winfonts # 将windows字体拷贝至新目录 alair@e6440:~$ sudo cp /media/alair/sys/Windows/Fonts/* /usr/share/fonts/winfonts/ # 删除不需要的fon文件 alair@e6440:~$ sudo rm -rf /usr/share/fonts/winfonts/*.fon # 应用字体目录，生成缓存 alair@e6440:~$ sudo mkfontscale alair@e6440:~$ sudo mkfontdir alair@e6440:~$ sudo fc-cache

UbuntuTouch更换国内源

Aug 04, 2019

在一加3T上安装完UbuntuTouch后，参考此文开启SSH登录。 接下来就是更换软件源了，国内推荐USTC和清华大学开源镜像。 通过vi /etc/apt/sources.list 编辑软件源,然后在vi中通过以下命令进行替换操作： :%s/ports.ubuntu.com/mirrors.tuna.tsinghua.edu.cn/g 保存后即可。

Ubuntu/Widnows双系统时间不一致解决方法

Jul 09, 2019

安装Ubuntu和Windows双系统的情况下，Ubuntu的时间总会和Windows的时间相差8小时，原因在于widows认为BIOS时间是本地时间，Ubuntu认为BIOS时间是UTC时间，即协调世界时(Universal Time Coordinated)，是由国际无线电咨询委员会规定和推荐,并由国际时间局(BIH)负责保持的以秒为基础的时间标度。 …