Linux Hints

• Problem: Moving files into a web directory, even after changing permissions reporting a permission error when clicked on from web:
  • restorecon -r < path >
• Adding a user to an existing group
  • usermod -a -G {group} (username}
• Listing groups a user belongs to
  • groups {username}
• Forcing all files in a folder to belong to a group:
  • chmod g+s dir
• Ubuntu: setting your default shell:
  • chsh
  • then type the path to the shell you want, ex: /bin/bash
• Adding a user
  • useradd -c "{USER FULL NAME}" -g {group} {username}
• set password for a user
  • passwd {username}
• Force the user to change their password on next login
  • chage -d 0 {username}
• Copy disk image
  • sudo dd if=/path/of/source of=/path/of/destination bs=1M

Kmail

Kmail won't open folders

This one is mostly a matter of restarting so KMail can fetch those pesky items... Some possible steps: Use Alt + F2 or Konsole to type: kquitapp kmail, then wait a minute, then akonadictl stop, wait a minute, type akonadictl start, wait a minute, type kmail. This stops KMail (closing all windows), stops the KMail backend, starts the KMail backend, starts KMail. Having a working internet connection increases the chances of success. Sometimes, you can also just do kquitapp kmail, wait a minute, and start KMail again. Often, a few restarts seem to be needed. It is unclear what is the reason for this, but on bad network connections it is more likely to happen.

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