Try changing the permissions on .ssh/authorized_hosts to restrict READ AND WRITE to your user eg. chmod go-rw ~/.ssh/authorized_hosts SSH doesn’t like it when these files are world-readable Assuming that you wish to login to the machine called mystery from your current host with the id_rsa and id_rsa.pub files you’ve just generated you should run the …

ZABBIX ====== http://www.zabbix.com [^] This is an open source and seems quite good. It is available through Debian Repository as packages: zabbix-frontend-php (for central monitoring host) installed in monitoring server zabbix-server-mysql (for central monitoring host) installed in monitoring server zabbix-agent (for each monitored host) Installed in ALL 8 Hosts The mysql data: DB: zabbix user: …

After cheking the backups I found that some didn’t get done properly(eg. WWW-1) but in HP-1 everything was OK. The old backups previously done via duplicity will be available still for a few months and then will be deleted. These old backups are in ‘bkdirx_duplicity’ directories. Finally I decided to change the program used to …

1. Determine the size of the new swap file and multiple by 1024 to determine the block size. For example, the block size of a 64 MB swap file is 65536. 2. At a shell prompt as root, type the following command with count being equal to the desired block size: dd if=/dev/zero of=/swapfile bs=1024 …

Error message: Cannot open master side of pty: No such file or directory Then Add the following in /etc/fstab none /dev/pts devpts mode=0620 0 0

NOTE: This worked for the RescueCD.iso file but might need some tweeking for other types of live CDs. Here we are assuming that the USB disk is: /dev/sdc – Make sure the single stick partition is: – the partition is tagged as bootable.(use fdisk for that) – formatted as VFAT32 mkfs.vfat -F 32 -n MYLABEL …

wget -q -O – http://www.mysite.com

use the tool: taskset

The solution: uncomment(activate) GSSAPIAuthentication=no in /etc/ssh/ssh_config

In ~/.mc/ini editor_visible_spaces=0 editor_visible_tabs=0

wodim –devices wodim dev=/dev/cdrw -v -data cd_image.iso More Brning features under Ubuntu https://help.ubuntu.com/community/CdDvd/Burning

Mounting: sshfs -Cuser@severname:/path/to/mount /local/mount/point -o follow_symlinks -o allow_other Unmounting: fusermount -u /local/mount/point

lsb_release -a

echo “/home/jadmin/server/server005A1” | sed ‘s/.*\([0-9]\)\s*$/\1/g’ Response: 1

Probleme mit GPG Wenn apt-get update eine Fehlermeldung in der Art liefert ————- GPG error: http://security.debian.org testing/updates Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY 010908312D230C5F ————- hilft: apt-get install debian-archive-keyring apt-key update

Needs to set the client as follows after connection established to limit the use of port and guarantee SSL transport of Data (default is still unencrypted) set port-range 1025-1025 set ftp:ssl-protect-data true

printf “%10s %10s\n” foo bar or even better cat /etc/fstab | column -t

To burn MP3 files with K3B install the libk3b2-extracodecs.

FROM: Java 6u12 bringt 64bit Plugin für Ubuntu / Linux Java 6u12 wurde von Sun für den produktiven Einsatz freigegeben. Vermutlich nicht zuletzt dank JavaFX wurde nun nach sechs Jahren(!) damit der Bug 4802695 geschlossen: Es gibt nun ein 64 bit Java Plugin für Linux und auch für Windows. Endlich! Wer Ubuntu 8.10 Intrepid hat, …

vim -c “syntax enable” -c “set syntax=apache” $FILE_NAME

Note that we used a different delimiter, @ for the substitution command. Sed permitsseveral delimiters for the s command including @%,;: these alternative delimiters aregood for substitutions which include strings such as filenames, as it makes your sedcode much more readable.

less -p pattern filaname

{section} {column:width=5%} {column}  {column} Text comes here {column} {section} Adding a ‘Table of content’ atht eh beginning of the cdocument h2. Table of content {toc:outline=true|indent=0px|maxLevel=3}

Install the following packages: checkinstall

apt-get install stress $ stress –cpu 4 –vm 2 –vm-bytes 2G –timeout 60s $ stress –cpu 4 –vm 2 –vm-bytes 15G –timeout 1800s Belegt für 60s vier CPUs und 2 GB RAM. Funktioniert auch als normaler User, als root aber aggressiver, würde ich nach kurzem Test sagen. Hoffentlich lassen sich auch 16 GB belegen. Mit …

PATH_TO_STORE=”/root/packages” FILE_TO_STORE=”installed_packages.txt” dpkg –get-selections | awk ‘{ if ( $2 == “install” ) print $1 ” ” $2 }’ > $PATH_TO_STORE/$FILE_TO_STORE

zgrep -i affil -c web01-jadmin-2009-02-03-0006.log.gz

The number of maximum files was reached, how do I fix this problem? Many application such as Oracle database server needs this range quite higher. So you can increase the maximum number of open files by setting new value in kernel variable /proc/sys/fs/file-max as follows (login as the root): # sysctl -w fs.file-max=100000 Above command …

ls -l /home/helix/videos/* | cut -d’ ‘ -f8 | egrep -o ‘([^/]+$)’ In this example egrep starts from the back of the line and outputs only till ‘/’ appears This command can replace the basename command for multiple arguments

ssh -2 sun.linux.local -L 7772:sun.linux.local:80

echo x | telnet -e x hostname 22

This solves the trick by disabing the sub-shells. mc -u

ssh-keygen -f /etc/ssh_host_rsa_key -N ”

update-alternatives –config java

wget -o /dev/null -O – http://checkip.dyndns.org | egrep -o ‘([[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3}\.[[:digit:]]{1,3})’

date +’%d/%b/%Y:%H:%M’ -d “today +3 days +6 hours +15 minutes”

eg. generating 1 2 3 4 5 …. till 100 > seq -w 1 100 (-w is for 01 02 03…. instead of 1 2 3 …. )

cat /etc/motd | gzip | ssh remoteserver.com ‘cat | gunzip > /tmp/test_motd2’

Use kgpg and right mouse click Export ….

dig +short +tcp @79.171.206.20 www.jamba.de or dig +short +notcp @79.171.206.20 www.jamba.de

#!/bin/bash while true; do echo “Hello World!” perl -e ‘select( undef, undef, undef, 0.25 );’ done

for ((ip=1;$ip

AS ROOT: – Download the sykpe static version from: http://www.skype.com/go/getskype-linux-static and unpack it in /usr/local/skype cp /usr/local/skype/skype /usr/bin mkdir /usr/share/skype cp -a /usr/local/skype/avatars /usr/local/skype/icons /usr/local/skype/lang /usr/local/skype/sounds /usr/share/skype/ apt-get install ia32-libs AS USER: – Create a launch icon on desktop that runs: linux32 skype

apt-get install build-essential

snmpnetstat -v 2c -c public -t 330 -n -P tcp Hostname

#!/usr/bin/perl print “Enter Anything: “; chomp($string = ); $string = reverse $string; print “$string\n”;

From: http://azio.org/2007/10/10/eternal-bash-history-super-duper-useful/ in /etc/profile and in /etc/bash.bashrc ———————————————————————– export HISTTIMEFORMAT=”(%d.%m.%Y) %H:%M ” export PROMPT_COMMAND=”${PROMPT_COMMAND:+$PROMPT_COMMAND ; }”‘echo “`date +’%d.%m.%y-%H:M:%S:’`” $USER “(“$ORIGINAL_USER”)” \ “COMMAND: ” “$(history 1 | cut -c8-)” >> /var/log/bash_eternal_history’ readonly PROMPT_COMMAND ———————————————————————– and then as root run the commands: touch /var/log/bash_eternal_history chmod 777 /var/log/bash_eternal_history chattr +a /var/log/bash_eternal_history

– Make sure that the setting AcceptEnv is not set in /etc/ssh/sshd_config AcceptEnv Specifies what environment variables sent by the client will be copied into the session’s environ(7). See SendEnv in ssh_config(5) for how to configure the client. Note that environment passing is only supported for protocol 2. Variables are specified by name, which may …

eg. line 222 in known_hosts sed ‘222 d’ /home/tobias/.ssh/known_hosts > /tmp/1;cp /tmp/1 /home/tobias/.ssh/known_hosts

To be able to foreward an SSH key for ssh to server1 and from server1 ssh to server2 etc. 1) apt-get install keychain 2) use the following ssh command: > keychain -q id_rsa ; . ~/.keychain/$HOSTNAME-sh ; ssh -A user@servername 3) After logged in server1 always use: ssh -A user@servername

There is an easy way to start a program during system boot. Just put this in your crontab: @reboot /path/to/my/program The command will be executed on every (re)boot. Crontab can be modified by running crontab -e Other available Options string meaning —— ———– @reboot Run once, at startup. @yearly Run once a year, “0 0 …

———-Listen list————- netstat -ltpn lsof -i | grep LISTEN ———- Connection list ——- netstat -tpn lsof -i | grep ESTABLISHED

use this command inside the name $(date +%Y.%m.%d_%H:%M:%S)

Assume you have copied a file across the network using something like this: scp host:/path/to/file . Then assume something goes wrong, so the transfer is interrupted. To continue the transfer, do this: rsync –partial host:/path/to/file . (Or, rather, always use rsync as above when transferring very large files.) (Also note: I don’t know how frequently …

1. Install WML-Browser: https://addons.mozilla.org/en-US/firefox/addon/62 2. Install User Agent Switcher: https://addons.mozilla.org/en-US/firefox/addon/59 3. Install XHTML Mobile Profile: https://addons.mozilla.org/en-US/firefox/addon/1345 4. Restart Firefox 5. Download this file to your desktop: http://techpatterns.com/downloads/firefox/useragentswitcher.xml (Right mouse button “Save Link As”) or http://techpatterns.com/downloads/firefox/useragentswitcher.xml 6. Go to: Tools -> User Agent Switcher -> Options -> Options 7. Click on Import and select the *useragentswitcher.xml* …