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awarded  Nice Answer
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answered How to use Python like Windows?
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revised 15.04 won't load from USB, locks up after login
edited title
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comment 15.04 won't load from USB, locks up after login
Can you give some more details about what is happening ie did you boot from the USB, what is happening on screen when it locks up, etc. When it locks up, are you able to switch to terminal with CTRL+ALT+F1? Any other relevant details too.
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awarded  Nice Answer
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revised Libre Office won't open
formatting
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comment I want the latest updates!
FYI do-release-upgrade does not require sudo, it will make its own call to sudo. The steps prior to running do-release-upgrade in this answer usually aren't required, but this answer is comprehensive enough to cover all bases.
2d
comment Is it safe (secure) to change the owner of the html/ folder in Apache?
Those Ubuntu images simply set up a normal user account with the name "ubuntu" so you can use it like your own account ie it's not a built-in system account. It should be fine to change ownership of anything in /var/www including files and directories to that account. In terms of security risk an attacker would need to somehow get the privileges of your personal account which should be difficult™ (no daemons run as this user, hopefully you have key based SSH auth and don't allow root login).
Jul
1
revised Is it safe (secure) to change the owner of the html/ folder in Apache?
added 82 characters in body
Jul
1
answered Is it safe (secure) to change the owner of the html/ folder in Apache?
Jul
1
comment Is it safe (secure) to change the owner of the html/ folder in Apache?
Having any files owned by www-data is a security risk because it breaks the principle that the www-data user should have no write access to any files. It is, however, necessary with some web apps that need to store files in the filesystem. When this is the case, www-data ownership should ONLY be given to these particular files and folders that you need to be writable by the web server, not to a whole website. That is, you want to keep the number of files writable by the www-data user to a minimum.
Jul
1
comment How to mount a samsung galaxy s5?
Unfortunately not possible on S5 or most modern Android phones (there are exceptions, eg Huawei phones). The reason is USB mass storage needs exclusive access to the entire partition which needs to be un-mounted on the phone while it's shared, whereas modern Android devices like the S5 do not keep user files in a separate partition that can be un-mounted. It wouldn't be technically possible. MTP allows sharing files non-exclusively without need to un-mount entire partition which is why modern phones are limited to MTP.
Jul
1
comment How to mount a samsung galaxy s5?
You cannot mount modern Android devices such as the S5 as USB mass storage. The reason is USB mass storage needs exclusive access to the entire partition which needs to be un-mounted on the phone while it's shared, whereas modern Android devices like the S5 do not keep user files in a separate partition that can be un-mounted. It wouldn't be technically possible. MTP allows sharing files non-exclusively without need to un-mount entire partition.
Jul
1
answered Ubuntu Server 12.04 and 14.04 LTS compatibilty and reason for upgrade
Jul
1
comment mount: you must specify the filesystem type
Change from testdisk to photorec is because testdisk is for undeleting when the partition is healthy, or finding a lost (but healthy) partition. Photorec is for recovering some file types when the partition is corrupt and eg. can't be mounted.
Jun
30
revised mount: you must specify the filesystem type
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Jun
30
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Jun
30
comment Many windows automatically opened on Ubuntu 14.04
Do you have a screenshot? If you don't know how, feel free to take a photo of screen.