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helpful_ubuntu_commands [2026/06/23 12:59] mikehelpful_ubuntu_commands [2026/08/08 20:15] (current) mike
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 ====== Helpful Ubuntu/Linux Commands and Procedures ====== ====== Helpful Ubuntu/Linux Commands and Procedures ======
 +==== Miscellaneous/General Commands ====
  
 === Disable Ubuntu Pro "Ads", Etc. === === Disable Ubuntu Pro "Ads", Etc. ===
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 === Determine the date the system was installed (not 100% reliable) === === Determine the date the system was installed (not 100% reliable) ===
   tune2fs -l /dev/vda2 | grep ‘Filesystem created:’ (replace vda2 with device where root filesystem is located)   tune2fs -l /dev/vda2 | grep ‘Filesystem created:’ (replace vda2 with device where root filesystem is located)
-  + 
 +=== Copy an existing partition to a new partition === 
 +  sudo rsync -aAXv --info=progress2 --exclude='/lost+found' /disk2/ /newdisk/ 
 === Finding largest files/directories === === Finding largest files/directories ===
   du -a /dir/ | sort -n -r | head -n 20 (replace 20 with the # of lines you wish to have returned)   du -a /dir/ | sort -n -r | head -n 20 (replace 20 with the # of lines you wish to have returned)
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   Create (or edit, if it exists) ~/.vimrc; into this file add the command syntax off, and save the file.   Create (or edit, if it exists) ~/.vimrc; into this file add the command syntax off, and save the file.
  
-**Overwrite/blast the boot block on the hard drive (<color red>ONLY when you want to re-install the operating system!</color>)** 
- 
-  dd if=/dev/zero of=/dev/sda count=1 bs=512 
-   
 === Find files consuming the root file system === === Find files consuming the root file system ===
   mkdir /tmp/rootbind   mkdir /tmp/rootbind
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 OTA DVR recordings are saved as **.ts** files, which are not compatible with DaVinci Resolve (my video editor of choice).  For this reason, we must convert the files into a format that “DR” can comprehend.  We can do this on linux using the ffmpeg package: OTA DVR recordings are saved as **.ts** files, which are not compatible with DaVinci Resolve (my video editor of choice).  For this reason, we must convert the files into a format that “DR” can comprehend.  We can do this on linux using the ffmpeg package:
   ffmpeg -i <inputfile.ts> -vcodec copy -acodec copy <outputfile.mp4>   ffmpeg -i <inputfile.ts> -vcodec copy -acodec copy <outputfile.mp4>
-  + 
 +**Overwrite/blast the boot block on the hard drive (<color red>ONLY when you want to re-install the operating system!</color>)** 
 + 
 +  dd if=/dev/zero of=/dev/sda count=1 bs=512 
 + 
 ==== Ansible/Automation Related Info ==== ==== Ansible/Automation Related Info ====
      
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 === Generate random keys === === Generate random keys ===
-  openssl rand -base64 48 +  openssl rand -base64 48     
-    +
 === Example of referencing an Ansible Vault === === Example of referencing an Ansible Vault ===
   ansible-playbook playbook.yml --vault-password-file ~/.ansible_vault_pass   ansible-playbook playbook.yml --vault-password-file ~/.ansible_vault_pass
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 Restart apache. Restart apache.
  
-=== Create new GPT disk partition ===+==== Create new GPT disk partition ====
 sudo into an elevated shell and then perform the following: sudo into an elevated shell and then perform the following:
   parted /dev/sdX (where X is the letter of the drive to be manipulated)   parted /dev/sdX (where X is the letter of the drive to be manipulated)
helpful_ubuntu_commands.1782244772.txt.gz · Last modified: by mike

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