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Parse kernel.org changelogs

February 4, 2011 by Igor Drobot Leave a Comment

Parsing kernel orgs changelogs can be a pain.

Here’s a handy one-liner to make it easier to read:

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wget --quiet -O - http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37 | grep -A 4 ^commit | grep -B 1 "^--" | grep -v "^--"

wget --quiet -O - http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.37 | grep -A 4 ^commit | grep -B 1 "^--" | grep -v "^--"

You should become human readable output like this one:

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    perf: Remove unused variable
    x86, bios: By default, reserve the low 64K for all BIOSes
    mlx4_en: Fix build warning in mlx4_en_create_rx_ring.
    mlx4_en: updated driver version
    mlx4_en: Moving to work with GRO
    mlx4_en: UDP RSS support
    mlx4_en: reconfiguring mac address.

perf: Remove unused variable x86, bios: By default, reserve the low 64K for all BIOSes mlx4_en: Fix build warning in mlx4_en_create_rx_ring. mlx4_en: updated driver version mlx4_en: Moving to work with GRO mlx4_en: UDP RSS support mlx4_en: reconfiguring mac address.

Filed Under: Bash, Debian, Kernel, Linux Tagged With: kernel.org, parsing

Two great signals

February 4, 2011 by Igor Drobot Leave a Comment

The best uses I’ve found for the SIGSTOP and SIGCONT signals are times when a process goes haywire, or when a script spawns too many processes at once.

Usage Examples for both signals:

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kill -SIGSTOP [pid]
kill -SIGCONT [pid]

kill -SIGSTOP [pid] kill -SIGCONT [pid]

[Read more…]

Filed Under: Bash, Debian, Linux Tagged With: kill, sigcon, sogstop

Courier time outs

February 4, 2011 by Igor Drobot 1 Comment

Your client (Thunderbird or Outlook) get time outs while you send mails or change between directories.

The first what you should do, check your logs:

This can be your possible error:
[Read more…]

Filed Under: Linux Tagged With: courier IMAP, IMAP, logrotate courier, time out, user limit

All Debian Releases

February 3, 2011 by Igor Drobot Leave a Comment

Debian

Very nice overview about all Debian releases:

Debian 8.0 Jessie
Debian 7.0 (coming 2013) Wheezy
Debian 6.0 (Latest Stable) 6 February 2011 Squeeze
Debian 5.0 14 February 2009 Lenny (5.0.7)
Debian 4.0 8 April 2007 Etch
Debian 3.1 6 June 2005 Sarge
Debian 3.0 19 July 2002 Woody
Debian 2.2 15 August 2000 Potato
Debian 2.1 March 9th, 1999 Slink
Debian 2.0 July 24th, 1998 Hamm
Debian 1.3 June 5th, 1997 Bo
Debian 1.2 December 12th, 1996 Rex
Debian 1.1 June 17th, 1996 Buzz
Debian 1.0 Never released –
Debian 0.93R6 November 1995 –
Debian 0.93R5 March 1995 –
Debian 0.91 January 1994 –
Debian 0.01 through 0.90 August-December 1993 –

Filed Under: Debian, Linux Tagged With: Buzz, Debian, Etch, Hamm, Potato, Rex, Sarge, Slink, Woody

Prevent brute force attacks

February 1, 2011 by Igor Drobot Leave a Comment


Fail2ban monitors log files like /var/log/auth.log and Webserver access logs and can temporarily or persistently bans failure-prone addresses by updating existing firewall rules.

Currently, by default, fail2ban supports ssh/apache/vsftpd but configuration can be easily extended for monitoring any other ASCII file.
[Read more…]

Filed Under: Debian, Linux Tagged With: Brute force, Security SSH

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