Ubuntu: No need to provide password when run sudo
[crayon-684403e47816c473061959/]
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View list of users in a group
[crayon-684403e478492939955080/]
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Add new user and add it to sudo group
With 12.04 and later If the user already exists [crayon-684403e4785a5292372127/] To create the user [crayon-684403e4785a7666046266/]
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Dovecot: (keywords_update_records): assertion failed: (data_offset >= sizeof(struct mail_index_record))
This means your index is corrupted, we need to rebuild it find /user/emailfolder -name ‘dovecot*’ -type f -delete”
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Apache: AuthType configured with no corresponding authorization directives
This happens when we upgrade my Apache to 2.4.7 , it turns out that we haven’t got removed the old…
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Secure Web/Mail/Database with certificate
Web/Mail/Database can use the same certificate to allow its client to connect to the server. Postfix: [crayon-684403e47880f573229430/] Dovecot (POP3/IMAP server)…
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Ubuntu: cp copy overwrite without prompting
when you run: cp -rf /source/* /destination , it always ask you to confirm the overwrite action. Root cause: it’s…
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Python: Realtime web print out
There are some situation when we run a time-consuming process, we need to see the output of that command to…
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Can’t Use apt i.e. /boot is 100% full
NOTE: this is only if you can’t use apt to clean up due to a 100% full /boot 1. Get…
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Dovecot – Iredmail SSL installation
First of all, we need to order a certificate , this certificate is the same with normal web server certificate.…