Pak Jiddat - Innovative Software Services

Read: In the name of thy Lord Who createth, Createth man from a clot. Read: And thy Lord is the Most Bounteous, Who teacheth by the pen, Teacheth man that which he knew not. Nay, but verily man is rebellious That he thinketh himself independent!. Lo! unto thy Lord is the return. (Sura Alalaq 96:8)

Running multiple versions of mailx command

Created On: 24 Nov, 2017: 10:37:29 - Tags : command line tools | server management


Certains commands in Linux can be provided by multiple packages. The command provided by each package may differ. For example the mailx command is provided by the bsd-mailx package as well as the heirloom-mailx package. The mailx command provided by the packages use different command line parameters.

To force the system to use a command from a specific package we can use the update-alternatives command. For example the command: update-alternatives --set mailx /usr/bin/heirloom-mailx will set the mailx provided by heirloom-mailx as the default mailx command. So when we enter mailx on the command line, it will run the mailx provided by heirloom-mailx package.

The above command may give an error on Debian Stretch. If the error suggests that the mailx package has not been registered, then the error can be corrected by registering the heirloom-mailx package using the command: update-alternatives --install /usr/bin/mailx mailx /usr/bin/heirloom-mailx 10

Related Articles

  1. Finding name server records for domains using Dig
  2. Ignoring errors during MySQL import
  3. Backing up and restoring LXD containers
  4. Resizing Linux root partitions without unmount on Google Cloud
  5. Using PSCP command for copying files and directories
  6. Configuring SFTP/SSH access for LXC Containers
  7. Debugging programs on Linux using strace
  8. Generate Certificate Signing Request (CSR) for ssl certificates
  9. Split large files using split command in Linux
  10. Monitoring user activity with acct package
  11. Error in pushing changes to remote git repository
  12. Permanently authenticating with remote git repositories
  13. Passing command line arguments to Python script
  14. List users currently logged in
  15. Using Redir command for redirecting ports
  16. Sending email through Gmail server using mailx command
  17. Fetching website resource over https using wget
  18. Delete downloaded file using Wget
  19. Using Oauth2l
  20. How to Backup and Restore LXC containers
  21. Fix ntfs disk is corrupt error
  22. Recover deleted files on ext3/ext4 file system using Photorec
  23. Convert pdf files to text files
  24. Viewing number of files in directory
  25. Using Rsync to copy all files recursively into one folder
  26. Using SED tool for replacing text in files
  27. Automate scp command using sshpass