Problem installing software: unmet dependencies

[DelfinDelfin]

Hi, I tried to install a lamp server on my raspberry pi. I think I did something wrong and now I can't install anything. Whenever I write "sudo apt-get install something", (for example "vim") I got the next mesagge:

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    Reading package lists... Done
    Building dependency tree
    Reading state information... Done
    You might want to run 'apt-get -f install' to correct these:
    The following packages have unmet dependencies:
    mysql-server : Depends: mysql-server-5.5 but it is not going to be installed
    vim : Depends: vim-runtime (= 2:7.3.547-7) but it is not going to be installed
    E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

Do you have any ideas of how can I fix this problem? Thanks in advance. Sorry, I am new on this so I am sure that maybe is something too obvious, but I don't know how to fix it by myself.

[AndyD]

The error message is suggesting you run

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apt-get -f install

to correct the problem. Did you try that? Try:

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sudo apt-get -f install

[DelfinDelfin]

yes, I did that, and I got the next:

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Reading package lists... Done
Building dependency tree
Reading state information... Done
Correcting dependencies... Done
The following extra packages will be installed:
  mysql-server-5.5
Suggested packages:
  tinyca
The following NEW packages will be installed:
  mysql-server-5.5
0 upgraded, 1 newly installed, 0 to remove and 51 not upgraded.
13 not fully installed or removed.
Need to get 0 B/1,620 kB of archives.
After this operation, 30.8 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
Preconfiguring packages ...
(Reading database ... 82752 files and directories currently installed.)
Unpacking mysql-server-5.5 (from .../mysql-server-5.5_5.5.46-0+deb7u1_armhf.deb) ...
ERROR: There's not enough space in /var/lib/mysql/
dpkg: error processing /var/cache/apt/archives/mysql-server-5.5_5.5.46-0+deb7u1_armhf.deb (--unpack):
 subprocess new pre-installation script returned error exit status 1
Errors were encountered while processing:
 /var/cache/apt/archives/mysql-server-5.5_5.5.46-0+deb7u1_armhf.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)

I don't know why it says "There's not enough space in /var/lib/mysql/". I have an 8 gb sd card, and I haven't installed so many things yet

[Mesdag]

I do not have an answer for this, but have a similar problem with apt-get, in case the problem and solution is related. Below is an example:

pi@raspberrypi:~ $ sudo apt-get install pyperclip
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package pyperclip

I've updated and upgraded both before and after doing the apt-get (and also tried the "apt-get -f" proposal, but got the same result. I have tried to install various packages and get same error with all. There are various other posts with problems that seem to be similar, but none that seem to have solutions to this (basic?) issue.

[buja]

I suggest you check your disk space anyway with

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df -h

[DelfinDelfin]

with "df -h":

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Filesystem      Size  Used Avail Use% Mounted on
rootfs          2.9G  2.9G     0 100% /
/dev/root       2.9G  2.9G     0 100% /
devtmpfs        460M     0  460M   0% /dev
tmpfs            93M  228K   93M   1% /run
tmpfs           5.0M     0  5.0M   0% /run/lock
tmpfs           186M     0  186M   0% /run/shm
/dev/mmcblk0p1   56M   19M   37M  34% /boot
tmpfs           186M     0  186M   0% /tmp

[Navyscourge]

It looks like you installed with NOOBS and did not expand your file system to fill the whole card; it says the size is 2.9G. In a terminal window, type

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sudo raspi-config

and choose the 'Expand Filesystem' option

[buja]

It looks like you need to expand your SD card capacity. Right now the capacity is only 4 GB and it's full (use%=100%). That's a bit odd, but perfectly normal for a Pi.
Expanding the filesystem is easy with raspi-config:

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sudo raspi-config

Choose menu option 1 Expand Filesystem. The Pi will now resize the filesystem on the SD card to use the full SD card capacity (8 GB in your case). Exit raspi-config, reboot and try the df -h command again. It should now show 50% use and you can try to install whatever you want again.

[DelfinDelfin]

it worked! Thanks a lot!

[DirkS]

I do not have an answer for this, but have a similar problem with apt-get, in case the problem and solution is related

Your problem is not even remotely similar.
Your error message clearly states that there is no package 'pyperclip' in the repository.
Please do not hijack topics. It generally results in a big mess and there's a good chance you will not get your problem addressed.

Re your error: pyperclip cannot be installed with apt-get.
It is available on pypi so you should be able to install it with

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sudo pip install pyperclip

for python 2. For python 3 use

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sudo pip3 install pyperclip

You may have to install pip first:

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sudo apt-get update
sudo apt-get install python-pip

For python 3 you need

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sudo apt-get update
sudo apt-get install python3-pip

[Mesdag]

Thanks DirkS. That solved my problem (of course you'll say ...). I'll keep your advice about topics in mind. Best Mesdag