How to fix a locale setting warning from Perl

Question

When I run perl  I get the warning   perl  warning  Setting locale failed  perl  warning  Please check that your locale settings      LANGUAGE    unset       LC ALL    unset       LANG    en US UTF-8  are supported and installed on your system  perl  warning  Falling back to the standard locale   C     How do I fix it

User · Answer

We will set locales that are not unset after reboot.

First open the Bash file and edit it:

nano .bashrc

Add these lines to the file:

export LC_ALL="en_US.UTF-8"
export LANG="en_US.UTF-8"
export LANGUAGE="en_US.UTF-8"

Activate the change by reloading Bash:

source ~/.bashrc

Test results:

locale

User · Answer

Adding the following to  etc environment fixed the problem for me on Debian and Ubuntu  of course  modify to match the locale you want to use    LANGUAGE en US UTF-8 LC ALL en US UTF-8 LANG en US UTF-8 LC CTYPE en US UTF-8

User · Answer

If you are creating a rootfs using debootstrap you will need to generate the locales   You can do this by running      optional  enable missing locales sudo nano  etc locale gen    then regenerate sudo locale-gen   This tip comes from  https   help ubuntu com community Xen

User · Answer

You need to configure locale appropriately in  etc default locale  logout  login  and then run the regular commands  root host    echo -e  LANG en US UTF-8 nLC ALL en US UTF-8   gt   etc default locale root host    exit local-user local    ssh root host root host    locale-gen en US UTF-8 root host    dpkg-reconfigure locales

User · Answer

Following the accepted answer      LANG C ssh hunter2    LC ALL C ssh hunter2   on the client side did the trick for me

User · Answer

I am now using this     cat  etc environment     LC ALL en US UTF-8 LANG en US UTF-8   Then log out of SSH session and log in again   Old answer   Only this helped me     locale locale  Cannot set LC ALL to default locale  No such file or directory LANG en US UTF-8 LANGUAGE  LC CTYPE en US UTF-8 LC NUMERIC ru RU UTF-8 LC TIME ru RU UTF-8 LC COLLATE  en US UTF-8  LC MONETARY ru RU UTF-8 LC MESSAGES  en US UTF-8  LC PAPER ru RU UTF-8 LC NAME ru RU UTF-8 LC ADDRESS ru RU UTF-8 LC TELEPHONE ru RU UTF-8 LC MEASUREMENT ru RU UTF-8 LC IDENTIFICATION ru RU UTF-8 LC ALL     sudo su    export LANGUAGE en US UTF-8   export LANG en US UTF-8   export LC ALL en US UTF-8    locale-gen en US UTF-8 Generating locales      en US UTF-8    up-to-date Generation complete     dpkg-reconfigure locales Generating locales      en AG UTF-8    done   en AU UTF-8    done   en BW UTF-8    done   en CA UTF-8    done   en DK UTF-8    done   en GB UTF-8    done   en HK UTF-8    done   en IE UTF-8    done   en IN UTF-8    done   en NG UTF-8    done   en NZ UTF-8    done   en PH UTF-8    done   en SG UTF-8    done   en US UTF-8    up-to-date   en ZA UTF-8    done   en ZM UTF-8    done   en ZW UTF-8    done Generation complete     exit    locale LANG en US UTF-8 LANGUAGE en US UTF-8 LC CTYPE  en US UTF-8  LC NUMERIC  en US UTF-8  LC TIME  en US UTF-8  LC COLLATE  en US UTF-8  LC MONETARY  en US UTF-8  LC MESSAGES  en US UTF-8  LC PAPER  en US UTF-8  LC NAME  en US UTF-8  LC ADDRESS  en US UTF-8  LC TELEPHONE  en US UTF-8  LC MEASUREMENT  en US UTF-8  LC IDENTIFICATION  en US UTF-8  LC ALL en US UTF-8

User · Answer

Your OS doesn t know about en US UTF-8  You didn t mention a specific platform  but I can reproduce your problem    uname -a OSF1 hunter2 V5 1 2650 alpha   perl -e exit perl  warning  Setting locale failed  perl  warning  Please check that your locale settings      LC ALL    unset       LANG    en US UTF-8      are supported and installed on your system  perl  warning  Falling back to the standard locale   C    My guess is you used ssh to connect to this older host from a newer desktop machine  It s common for  etc ssh sshd config to contain AcceptEnv LANG LC    which allows clients to propagate the values of those environment variables into new sessions  The warning gives you a hint about how to squelch it if you don t require the full-up locale    env LANG C perl -e exit   or with Bash    LANG C perl -e exit    For a permanent fix  choose one of  On the older host  set the LANG environment variable in your shell s initialization file  Modify your environment on the client side  e g   rather than ssh hunter2  use the command LANG C ssh hunter2  If you have administrator rights  stop ssh from sending the environment variables by commenting out the SendEnv LANG LC   line in the local  etc ssh ssh config file   Thanks to this answer  See Bug 1285 for OpenSSH for more

User · Answer

In my case  with Debian  8 6  Jessie   I had to change settings in   etc ssh ssh config  for   AcceptEnv LANG LC    and sshd config for  SendEnv LANG LC   Then restart the ssh service  At last  I did  locale-gen en US UTF-8 and dpkg-reconfigure locales

User · Answer

perl  warning  Falling back to the standard locale   C    locale  Cannot set LC ALL to default locale  No such file or directory   Solution   Try this  uk UA UTF-8 is my current locale  Write your locale  for example en US UTF-8     sudo locale-gen uk UA UTF-8   and this   sudo dpkg-reconfigure locales

User · Answer

For Ubuntu use this   export LANGUAGE en US UTF-8  export LC ALL en US UTF-8  export LANG en US UTF-8  export LC TYPE en US UTF-8  It worked for me

User · Answer

If this problem occurs while you are connecting via ssh to a remote host then it is possible that the remote system is missing certain locales  I am not going to repeat how to install and configure locales as this has been well explained by other answers already  As other answers have pointed out  ssh should be passing your local computer s locales to the remote host  For example  if you have Australian locales set  e g   en AU UFT-8   and you are connecting to a newly setup Ubuntu Server which only comes with en US UTF-8 then you will receive this warning  To solve this problem you have several options   Install the required locales on the remote host such that they match locales configured on your client   Change the SSH configuration to not pass your clients  environment variables  I would not recommend this   Override the locale on your remote machine by exporting locale settings from file  bashrc and friends

User · Answer

Export the variable   export LANGUAGE en US UTF-8   export LC ALL en US UTF-8   export LANG en US UTF-8   export LC CTYPE en US UTF-8  Next run   sudo locale-gen   sudo dpkg-reconfigure locales   When you run dpkg-reconfigure locales it asks you to choose the locales  choose en US UTF-8   If you run this by selecting all locales  it will take some time to configure

User · Answer

Here is how to solve it on Mac  OS  X v10 7  Lion  or Cygwin  Windows 10   Add the following lines to your bashrc or bash profile file on the host machine    Setting for the new UTF-8 terminal support in Lion export LC CTYPE en US UTF-8 export LC ALL en US UTF-8  If you are using Z shell  zsh   edit file zshrc    Setting for the new UTF-8 terminal support in Lion LC CTYPE en US UTF-8 LC ALL en US UTF-8

User · Answer

In Arch Linux using a UK keyboard and locale  I had the following error  perl  warning  Setting locale failed  perl  warning  Please check that your locale settings  LANGUAGE    unset   LC ALL    unset   LANG    quot en US utf8 quot    Exporting my locales in  etc profile didn t fix it   I did however fix this by editing  etc locale gen  also enabling the en US utf8 locale that perl expected to find  and running local-gen     I use pac-manager which uses a whole bunch of perl modules from AUR  so reinstalling perl in my particular case would be a nuisance

User · Answer

If you use Mac nbsp OS nbsp X v10 10  Yosemite  or above to connect in your server Linux  you can try these steps    Keep your file  etc ssh sshd-config original Put on your    bash profile  export LANG  en US  export LC ALL  LANG UTF-8  Run  dpkg-reconfigure locales   And select  en US UTF-8

User · Answer

Source of the problem I experienced this  logging in from one machine to another via ssh  The remote machine didn   t have the locale files  that I had on my local machine  You can either disable the forwarding of the locale from your local machine to the remote machine  in the file  etc ssh sshd config remove the line AcceptEnv LANG LC CTYPE      or install the locale  changing it is not necessary in this case   Installing On Fedora  Red Hat Linux  and CentOS I used sudo dnf install langpacks-de  for the German  de  language packs  I logged out  in  and it worked  Search for other langpacks with dnf search langpacks-  Changing Activating To list available locales I used localectl list-locales  And to set a new one sudo localectl set-locale de DE utf8

User · Answer

For me  on Ubuntu nbsp 16 04  Xenial Xerus  the following worked   root host   locale-gen en GB UTF-8 root host   localectl set-locale LANG en GB UTF-8 LC ALL en GB UTF-8   Then reboot

User · Answer

As always  the devil is in the detail     On Mac nbsp OS nbsp X nbsp v10 7 5  Lion   to fix some Django error  in my    bash profile I ve set   export LANG en EN UTF-8 export LC COLLATE  LANG export LC CTYPE  LANG export LC MESSAGES  LANG export LC MONETARY  LANG export LC NUMERIC  LANG export LC TIME  LANG export LC ALL  LANG   And in turn for a long time I got that warning when using Perl   My bad  As I ve realized much later  my system is en US UTF-8  I fixed it simply by changing from  export LANG en EN UTF-8   to  export LANG en US UTF-8

User · Answer

If you are running a chroot in CentOS  try manually copying  usr lib locale to the chroot environment for the account that is having this issue

User · Answer

Try to reinstall   localess apt-get install --reinstall locales   Read more in How to change the default locale

User · Answer

This generally means you haven t properly set up locales on your Linux box     On Debian or Ubuntu  that means you need to do    sudo locale-gen   sudo dpkg-reconfigure locales  See also man locale-gen

User · Answer

Use   export LANGUAGE en US UTF-8 export LC ALL en US UTF-8 export LANG en US UTF-8 export LC CTYPE en US UTF-8   It works for Debian  I don t know why - but locale-gen had not results   Important  It s a temporary solution  It has to be run for each session

User · Answer

All the previous answers are wrong  The message is clear - missing locale  The solution is to add the appropriate locale  You do that by editing the  etc locale gen file  remove the   sign in front of the locale being reported as missing and then issuing the command     sudo locale-gen   This will actually generate the locales specified in  etc locale gen and therefore the message will not be shown

User · Answer

For me  I fixed this error by editing the  bashrc file  adding exports  Add after the initial comments  Add language support  export LANGUAGE en US UTF-8 export LC ALL en US UTF-8 export LANG en US UTF-8 export LC TYPE en US UTF-8

User · Answer

In my case  this was the output   LANGUAGE    unset   LC ALL    unset   LC PAPER    ro RO UTF-8   LC ADDRESS    ro RO UTF-8          The solution was   sudo locale-gen ro RO UTF-8

User · Answer

For Debian users  I have this problem after modifying my locale to change machine s language  This is what I did   Modify  bashrc  export LANG fr FR UTF-8 export LC ALL fr FR UTF-8   Uncomment line fr FR UTF-8 in file etc locale gen - gt  sudo locale-gen to generate the missing package  sudo update-locale  sudo dpkg-reconfigure locales to configure my locale to fr FR UTF-8  Add extra lines to the etc default locale file  LANGUAGE en US UTF-8 LC ALL en US UTF-8 LANG en US UTF-8 LC TYPE en US UTF-8   Reboot my computer and everything works fine

User · Answer

With zsh ohmyzsh I added this to the  zshrc      You may need to manually set your language environment  LANGUAGE en US UTF-8  LANG en US UTF-8  LC CTYPE en US UTF-8  LC ALL en US UTF-8   By removing the line export LANG en US UTF-8  Reopened a new tab and SSHed in  worked for me

User · Answer

Setting the LC TYPE environment variable to the default locale language  quot C quot  will help to suppress this warning  Run export LC CTYPE  quot C quot  and try to run the perl command  P S  You need to set this variable in one of file  etc environment or file  etc default locale for a permanent solution

User · Answer

On Debian  after much searching  this did the trick  First  sudo apt-get purge locales  Then  sudo aptitude install locales  And the famous  sudo dpkg-reconfigure locales  This rids the system of locales  then re-installs locales and downgrades libc6 from 2 19 to 2 13 which is the issue  Then it configures locales again

User · Answer

Adding the correct locale to    bashrc     bash profile   etc environment and the like will solve the problem  however it is not recommended  as it overrides the settings from  etc default locale  which   is confusing at best and may lead to the locales not being applied consistently at worst   Instead  one should edit  etc default locale directly  which may look something like this   LANG en US UTF-8 LANGUAGE en US en LC CTYPE en US   The change will take effect the next time you log in  You can get the new locale in an existing shell by sourcing  etc default locale like this        etc default locale

User · Answer

I have this issue whenever I run a Perl script  such as enum4linux  on the latest Kali Linux version  kali kali    lsb release -a No LSB modules are available  Distributor ID     Kali Description     Kali GNU Linux Rolling Release     2020 3 Codename     kali-rolling kali kali     E g   kali kali    enum4linux perl  warning  Setting locale failed  perl  warning  Please check that your locale settings      LANGUAGE    unset       LC ALL    unset       LC ADDRESS    quot ms MY UTF-8 quot       LC NAME    quot ms MY UTF-8 quot       LC MONETARY    quot ms MY UTF-8 quot       LC PAPER    quot ms MY UTF-8 quot       LC IDENTIFICATION    quot ms MY UTF-8 quot       LC TELEPHONE    quot ms MY UTF-8 quot       LC MEASUREMENT    quot ms MY UTF-8 quot       LC TIME    quot ms MY UTF-8 quot       LC NUMERIC    quot ms MY UTF-8 quot       LANG    quot en US UTF-8 quot      are supported and installed on your system  perl  warning  Falling back to a fallback locale   quot en US UTF-8 quot    enum4linux v0 8 9  http   labs portcullis co uk application enum4linux   Copyright  C  2011 Mark Lowe  mrl portcullis-security com   Look at the warning message given  perl  warning  Falling back to a fallback locale   quot en US UTF-8 quot     Also  notice that LC ALL    unset  The solution is simple  All you have to do is to set it  export LC ALL en US UTF-8  E g   kali kali    export LC ALL en US UTF-8 kali kali     And problem solved kali kali    enum4linux enum4linux v0 8 9  http   labs portcullis co uk application enum4linux   Copyright  C  2011 Mark Lowe  mrl portcullis-security com   For a permanent solution  you might want to add it to the  bashrc file

User · Answer

ssh overwrites LC locale variables by default  See  etc ssh sshd config   AcceptEnv LANG LC     So maybe you need to set these variables in your local shell

User · Answer

Another Git-related answer   The source of the problem might be the Git server  If all else fails  try doing dpkg-reconfigure locales  or whatever is appropriate for your distribution  on the server

User · Answer

Add missing locales to file  bash profile  echo  quot export LANGUAGE en US UTF-8 export LANG en US UTF-8 export LC ALL en US UTF-8 quot  gt  gt    bash profile  Then source your  bash profile file  source    bash profile

User · Answer

Add LC ALL  en GB utf8  to  etc environment and reboot  That s all

User · Answer

For  macOS  amp  Mac OS X users only I was getting the same warning while using Git To resolve this warning Uncheck the Set locale environment variable on startup option and restart your terminal  Below screen shot represents my terminal settings

User · Answer

It is simple fix in Ubuntu  You have to generate the Locales from scratch  running the following commands from the command line   sudo locale-gen en US en US UTF-8 sudo dpkg-reconfigure locales   This should create the locales and then re-configure them

User · Answer

If you don t care about the locale issue  you can set PERL BADLANG 0  Of course  this could result in incorrect localisation

User · Answer

For anyone connecting to DigitalOcean or some other Cloud hosting provider from the iTerm2 app on macOS v10 13  High Sierra  and getting this error on some commands  perl  warning  Setting locale failed  perl  warning  Please check that your locale settings      LANGUAGE    unset       LC ALL    unset       LC CTYPE    quot UTF-8 quot       LANG    quot en US UTF-8 quot    are supported and installed on your system  perl  warning  Falling back to a fallback locale   quot en US UTF-8 quot     This fixed the problem for me

User · Answer

sudo nano  etc locale gen  Uncomment the locales you want to use  e g  en US UTF-8 UTF-8   Then run  sudo  usr sbin locale-gen  Source  Configuring Locales

User · Answer

perl -e exit sudo localedef -i en US -f UTF-8 en DE UTF-8                                     DE   German   Use your country code en lieu of  DE    The second  quot perl quot  should then not complain any more perl -e exit  localectl list-locales   Just make sure it is OK

[perl] How to fix a locale setting warning from Perl

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