$ watch -n 5 grep Dirty /proc/meminfo Gives you the amount of unsync’ed memory every 5 seconds.

pvcp(){ pv “$1” > $2 } Should work. Not yet tested ;).

I got: E558: Terminal entry not found in terminfo ‘screen-256color’ not known. Available builtin terminals are: … This means that the remote host you are working on does not know about the terminal ‘screen-256color’. Fix: local$ infocmp screen-256color > screen-256color.ti local$ scp screen-256color.ti remote: local$ ssh remote remote $ sudo yum install ncurses ncurses-bin #optional…

Simple fix, as root: # hostname -f hostname: Name or service not known # echo “127.0.0.1 `hostname`” >> /etc/hosts # hostname -f karlo-laptop

On support websites I am noticing there is a lot of confusion about system load. This post is my attempt to make a short guide to understanding (and fixing) high Linux system load. Disclaimer: I might be wrong ;). Get your current sysload: $ w 18:54:44 up 22 days, 22:47, 1 user, load average: 2.54,…

Don’t know what a syscall code means in your audit output? Follow these steps to find out: Find the source for your kernel: https://www.kernel.org/pub/linux/kernel/v2.6/ Extract the file Go to /[yourkernelversion]/arch/[your_architecture]/include/asm Open the header file unistd_[32/64].h Find the syscall code Defines: #define __NR_read 0 #define __NR_write 1 #define __NR_open 2 #define __NR_close 3 #define __NR_stat 4…

I was working on a server which did not have ntpq installed, so I couldn’t do ntpq -p. Simple solution is to stop the ntp service and run ntpd -d This will output logging to stdout. Simple solution ;).

I was not able to log into an old server. Directly after connecting over ssh, I got a “Server is going down” message. Solution is to reboot into safe mode, remove /etc/nologin, do a sync, and properly shutdown the machine.

When I was updating to a new openldap server version, I got: samba olcObjectClasses: AttributeType not found: “displayName” I first tried recompiling the ldif’s with a new samba.schema (you can find samba.schema in here), that made no difference. Solution is to move the files in /etc/openldap/slapd.d/cn=config/cn=schema . Change the numbering so that samba is after…

Are you getting the following on yum update ? libmcommon.so.0.0.1()(64bit) is needed by (installed) matahari-net-0.4.0-5.el6.x86_64 libmnet.so.0.0.1()(64bit) is needed by (installed) matahari-net-0.4.0-5.el6.x86_64 matahari-lib = 0.4.0-5.el6 is needed by (installed) matahari-net-0.4.0-5.el6.x86_64 libmqmfagent.so.0.0.1()(64bit) is needed by (installed) matahari-net-0.4.0-5.el6.x86_64 matahari-agent-lib = 0.4.0-5.el6 is needed by (installed) matahari-net-0.4.0-5.el6.x86_64 Solution: yum remove matahari* yum install matahari Matahari is deprecated.

A RHEL6 installation complained: “DeprecationWarning: Call to deprecated function: hasNow” in /usr/libexec/rhsmd . According to RedHat, this is not a problem, as rhsmd is working fine. Workaround in order to stop seeing the mails: # diff /tmp/rhsmd /etc/cron.daily/rhsmd 5c5 < /usr/libexec/rhsmd -s --- > /usr/libexec/rhsmd -s 2>&1 | grep -v DeprecationWarning

yum-utils-1.1.31-7 fixes this issue, but it’s not available for RHEL (as far as I see). You can fix /usr/bin/reposync: — a/reposync.py +++ b/reposync.py @@ -198,6 +198,7 @@ def main(): # maybe this shouldn’t be entirely fatal sys.exit(1) + exit_code = 0 for repo in my.repos.listEnabled(): reposack = ListPackageSack(my.pkgSack.returnPackages(repoid=repo.id)) @@ -293,7 +294,6 @@ def main(): pkg.repo.cache…

I couldn’t install activerecord-mysql-adapter. After some duckduckgo’ing, I found the solution. Error: Error: Building native extensions. This could take a while… ERROR: Error installing mysql: ERROR: Failed to build gem native extension. /usr/bin/ruby extconf.rb –with-mysql-config=/usr/lib64/mysql/mysql_config checking for mysql_ssl_set()… no checking for rb_str_set_len()… no checking for rb_thread_start_timer()… no checking for mysql.h… no checking for mysql/mysql.h… no…

First, find the dir you can put the font: $ grep dir /etc/fonts/fonts.conf . If it lists ~/.fonts , create the /home/username/.fonts dir Put the ttf file in the ~/.fonts directory < Rescan: $ fc-cache done.

I found working instructions here.

1. Install imagemagick 2. $ convert originalimage.png -crop 100%x50% +repace output-page.png

-edit- this only works for gnome with compiz $ ccsm go to window border type the following in ‘Decoration windows’: !(class=Gnome-terminal)

Do: $ dbus-launch gsettings set org.gnome.desktop.session session-name ‘gnome-fallback’

Go to: opera:config#Enable%20Mouse%20Flips Disable. :)

Go to opera:config, search for ‘Window Cycle Type’, change to 2

I had this: /home/karlo/.dropbox-dist/libz.so.1: version `ZLIB_1.2.3.3′ not found (required by /usr/lib64/libxml2.so.2) Failed to load module: /usr/lib64/gio/modules/libgvfsdbus.so And the icon did not show the sync-arrows. Disabling proxies worked for me. Right-click the db icon, settings, … you’ll find it.

Add this to your commandline: nouveau.perflvl_wr=7777 Will allow you to change the fan speed. After a reboot, change fan speed by; # echo 40 > /sys/class/drm/card0/device/pwm0 I put the following in the root crontab to monitor temperature: * * * * * test `cat /sys/class/drm/card0/device/temp1_input` -gt 75000 && echo 100 > /sys/class/drm/card0/device/pwm0 || echo 10…

Found here: http://blog.hacka.net/#post49 # yum install install ImageMagick pdftk $ cd jpgdir; for FILE in *.jpg; do convert $FILE -compress JPEG $FILE.pdf; done; pdftk “*.pdf” cat output allPages.pdf :)

Use dbus-launch before your command.

gconftool-2 –type string –set /apps/metacity/general/focus_mode mouse OR: Install ccsm Run it Go to general options Click ‘focus and raise behaviour’ Untick ‘raise to focus’ Now the windows will focus on hovering the mouse over it.

This script by user ‘kwall’ works well for the ssh-agent. Add ssh-add before the last ‘fi’ to add the default ssh keys into it as well.

Tuto here Only follow: gconftool-2 –type string –set /apps/metacity/general/focus_mode mouse Also raise: gconftool-2 –type boolean –set /apps/metacity/general/auto_raise true gconftool-2 –type string –set /apps/metacity/general/auto_raise_delay 600

Install encfs do $mkdir ~/Dropbox/Secure ; mkdir ~/DropboxSecure do $ encfs ~/Dropbox/Secure ~/DropboxSecure I chose paranoia mode. This will use the settings below. Enter a secure password and there you go. You now have a folder ‘DropboxSecure’, in which you can store your sensitive data. It will save this in ~/Dropbox/Secure/ . You can unmount…

Easier than my previous post, use this plugin for wordpress.

I generated SSL certs using this guide. Then I set up dovecot and postfix. View my dovecot conf here and my psotfix main.cf here. You can use this to configure your own working SSL mail. Remember to install: dovecot, dovecot-imap and postfix. On your devices, use ports 143/993 (incomping) and 587 (outgoing). Please note my…