2

I am currently using Ubuntu 18.04, and I need gcc 4.8 for MATLAB. So I tried to install gcc-4.8 using

$ sudo apt-get install gcc-4.8
E: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/l/linux/linux-libc-dev_4.15.0-117.118_amd64.deb  404  Not Found [IP: 2403:8940:3:1::f 80]
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

so I ran the command

sudo apt-get update 

I didn't show any error but running gcc version command gave this

$ gcc -v
Command 'gcc' not found, but can be installed with:
sudo apt install gcc

previously I used to have 7.5 but now it is not.

4

Open the terminal and type:

sudo apt install linux-libc-dev 
sudo apt-get -f install
sudo apt install gcc-4.8
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  • could you tell how to remove current version of gcc because i read the comment given by SEKHR i installed latest version once again could you tell me how to remove current version 7.5.0 and use old version sudo apt-get --purge remove gcc i tried by giving verion at end but it didnt work – SriHarsha Sep 28 at 7:00
  • There are two different ways to answer this comment 1. sudo apt remove gcc-7 (which removes gcc 7.5 in 18.04) 2. You can change the default gcc version by using the update-alternatives command to determine which actual file is referenced by a generic name, for example which actual file is referenced by gcc. For more information see the answers to this question: How to change the default GCC compiler in Ubuntu?. – karel Sep 28 at 7:14
  • it worked thank you – SriHarsha Sep 28 at 7:28
4

In your terminal type: sudo apt install gcc and enter. That should install the latest version of gcc.

If you want to install GCC 4.8 specifically, you may follow the post: How to install gcc-4.8.

As GCC 4.8 is available in the default repository on Ubuntu 18.04, then you can simply do

sudo apt-get install gcc-4.8

Or type sudo apt-get install gcc-4 in terminal and press tab. If GCC 4.8 is available it will either auto-complete or show the available versions. If there are versions available other than 4.8 as well, add .8 after sudo apt-get install gcc-4 and press enter to install.

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