Gentoo
HOWTO: Run Script On System Start And System Shutdown
/etc/local.d/ ├── README ├── booted.start ├── fixups.start ├── rebooted.stop └── screen.stop
su - root nano /etc/local.d/booted.start #!/bin/sh touch /booted nano /etc/local.d/rebooted.stop #!/bin/sh touch /rebooted
HOWTO: Disable Keyboard CTRL+ALT+DEL Reboot
Comment out the line with ctrlaltdel in this file...
su - root nano /etc/inittab # What to do at the "Three Finger Salute". # ca:12345:ctrlaltdel:/sbin/shutdown -r now
HOWTO: Ebuild Manual Install Process Steps
ebuild /path/to/ebuild fetch ebuild /path/to/ebuild digest ebuild /path/to/ebuild unpack (and edit .c source code files if needed) ebuild /path/to/ebuild compile ebuild /path/to/ebuild test ebuild /path/to/ebuild install ebuild /path/to/ebuild qmerge ebuild /path/to/ebuild clean
Thanks - https://www.gentoo.org/doc/en/handbook/2004.2/handbook-x86.xml?part=3&chap=6&style=printable
HOWTO: Reset The Manifest For An Ebuild On Checksum Failure
ebuild --force /usr/portage/dev-libs/geoip/geoip-1.4.8-r3.ebuild manifest
HOWTO: Reset Lost Root User Password
- Try Webmin. If not, then...
- Grub, e, init=bash at end of kernel line, b
Single user mode on Gentoo does prompt for username and password, so this is not the answer for a lost root password. If you do need to reset your root password try appending 'init=/bin/bash' instead and then 'mount -o remount,rw /' to give you a writable file system. Don't forget to 'sync' any changes to disk before rebooting.
How to Set up Dual Monitors for Intel Graphics with RandR 1.2
There are 2 modes for dual-head display: clone and extend. This command will give you an extended desktop to the right of the main display.
xrandr --output VGA1 --right-of HDMI1
https://01.org/linuxgraphics/documentation/how-set-dual-head-intel-graphics-randr-1.2
Installing The ClearType Microsoft Fonts
http://www.microsoft.com/typography/ClearTypeFonts.mspx
These fonts are really nice, especially Calibri.
To get them, follow these instructions:-
- Install the package 'cabextract'.
- Download the free PowerPointViewer from the Microsoft web site.
- cabextract -F ppviewer.cab PowerPointViewer.exe
- cabextract -F '*.TT?' -d /usr/share/fonts/vista /path/to/folder/with/ppviewer.cab
- fc-cache -fv
Enjoy.
Thanks to: http://www.oooninja.com/2008/01/calibri-linux-vista-fonts-download.html
ERROR: Failed WHIRLPOOL Verification
If you cannot emerge BASH because it fails the new WHIRLPOOL Verification checks on source files, then do the following...
Switch to Python 2.7 (which has some internal whirlpool verification)
eselect python list Available Python interpreters: [1] python2.6 * [2] python2.7 [3] python3.1 eselect python set 2
Edit out the line in /usr/portage/metadata/layout.conf...
nano /usr/portage/metadata/layout.conf
# manifest-hashes = SHA256 SHA512 WHIRLPOOL manifest-hashes = SHA256 SHA512
cd /usr/portage/app-shells/bash mv Manifest Manifest.old ebuild bash-4.2_p37.ebuild digest
emerge -1uv =app-shells/bash-4.2_p37
ERROR: !!! ParseError: Profile contains unsupported EAPI '5':
!!! Unable to parse profile: '/etc/make.profile' !!! ParseError: Profile contains unsupported EAPI '5': '/usr/portage/profiles/default/linux/x86/13.0/eapi' !!! Your current profile is invalid. If you have just changed your profile !!! configuration, you should revert back to the previous configuration. !!! Allowed actions are limited to --help, --info, --search, --sync, and !!! --version.
Fix...
eselect profile list
Available profile symlink targets:
[1] default/linux/x86/13.0 [2] default/linux/x86/13.0/selinux [3] default/linux/x86/13.0/desktop [4] default/linux/x86/13.0/desktop/gnome [5] default/linux/x86/13.0/desktop/kde [6] default/linux/x86/13.0/developer [7] hardened/linux/x86 [8] hardened/linux/x86/selinux [9] hardened/linux/uclibc/x86
Select hardened...
eselect profile set 7
Available profile symlink targets:
[1] default/linux/x86/13.0 [2] default/linux/x86/13.0/selinux [3] default/linux/x86/13.0/desktop [4] default/linux/x86/13.0/desktop/gnome [5] default/linux/x86/13.0/desktop/kde [6] default/linux/x86/13.0/developer [7] hardened/linux/x86 * [8] hardened/linux/x86/selinux [9] hardened/linux/uclibc/x86
OR
Select 0 as the target...
eselect profile set 0
Now update portage...
emerge -upv portage These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild U ] app-shells/bash-4.2_p37 [4.1_p9] USE="net nls (readline%*) -afs -bashlogger -examples -mem-scramble -plugins -vanilla" 95 kB [ebuild N ] app-crypt/mhash-0.9.9.9-r1 USE="-static-libs" 910 kB [ebuild N ] dev-python/python-mhash-1.4 17 kB [ebuild U ] sys-apps/portage-2.1.11.50 [2.1.10.41] USE="(ipc) -build -doc -epydoc (-pypy2_0) -python2 -python3 (-selinux) -xattr%" 875 kB Total: 4 packages (2 upgrades, 2 new), Size of downloads: 1,896 kB * IMPORTANT: 5 news items need reading for repository 'gentoo'. * Use eselect news to read news items.
Installation
http://en.gentoo-wiki.com/wiki/Safe_Cflags
http://www.gentoo.org/doc/en/gentoo-x86-quickinstall.xml
http://www.gentoo.org/doc/en/handbook/handbook-x86.xml
http://en.gentoo-wiki.com/wiki/RAID/Software
http://en.gentoo-wiki.com/wiki/Software_RAID_Install
http://en.gentoo-wiki.com/wiki/Custom_Stage4
# cat /root/misc/stage4.excl /dev/* /home/* /mnt/* /proc/* /sys/* /tmp/* /usr/portage/distfiles/* /var/tmp/*
$ cat /boot/grub/grub.conf default 0 timeout 3 title Gentoo Linux 2.6.37-r4 root (hd0,0) kernel /boot/kernel-2.6.37-gentoo-r4 root=/dev/md3
# /etc/fstab: static file system information. # <fs> <mountpoint> <type> <opts> <dump/pass> /dev/md1 /boot ext3 noauto,noatime 1 2 /dev/md2 none swap sw 0 0 /dev/md3 / ext3 noatime 0 1 /dev/md4 /home ext3 noatime 0 1
$ cat /etc/portage/package.use sys-libs/glibc userlocales sys-power/nut -usb sys-apps/iproute2 -minimal net-nds/openldap -minimal ssl dev-lang/php apache2 ctype curl gd hash ldap mysql nls pcre pdo session simplexml unicode xml net-misc/dhcp -minimal media-libs/gd jpeg png dev-perl/GD jpeg png net-dialup/mgetty -fax mail-mta/sendmail sasl mail-client/mutt -crypt imap dev-db/mysql -minimal net-analyzer/rrdtool -python perl sys-apps/smartmontools -minimal mail-filter/MailScanner f-prot spamassassin net-nds/openldap -ssl app-editors/nano -minimal x11-libs/cairo svg
$ cat /etc/portage/package.keywords sys-libs/pam ~amd64 net-nds/phpldapadmin ~amd64 sci-misc/boinc ~amd64 net-proxy/squid ~amd64 net-analyzer/squidsites ~amd64 net-firewall/fwanalog ~* * net-misc/hylafax ~amd64 net-dialup/mgetty ~amd64 net-analyzer/calamaris ~amd64 mail-filter/spamassassin ~amd64 mail-filter/MailScanner ~amd64 net-mail/tnef ~amd64 dev-perl/Filesys-Df ~amd64 app-admin/webmin ~amd64 net-firewall/shorewall-common ~amd64 net-firewall/shorewall-perl ~amd64
Kernel Config Files
config-server-x86_64-2.6.37-gentoo-r4
config-desktop-i686-2.6.38-gentoo-r6
http://how-to.wikia.com/wiki/How_to_configure_the_Linux_kernel
Favourite Kernel Config Options (Just For Fun)
B.A.T.M.A.N. Advanced Meshing Protocol (CONFIG_BATMAN_ADV) VMware Balloon Driver (CONFIG_VMWARE_BALLOON)
/dev files
Make a few basic device nodes needed for booting
mknod -m 660 /mnt/gentoo/dev/console c 5 1 mknod -m 660 /mnt/gentoo/dev/null c 1 3 mknod -m 600 /mnt/gentoo/dev/initctl p mknod -m 660 /mnt/gentoo/dev/tty1 c 4 1
Chrooting
mount -t proc none /mnt/gentoo/proc mount -o bind /dev /mnt/gentoo/dev chroot /mnt/gentoo /bin/bash env-update source /etc/profile touch /etc/mtab
Server Administration
Logging In
ssh username@ipaddress (type in your ssh passphrase) su - root (type in the root password) screen -r
Logging Out
Ctrl+A D Ctrl+D Ctrl+D
Rebooting The Server
reboot
Power Off The Server
poweroff
How Do I Check Something Has Started On Boot?
rc-status --all
How Do I Test Something Before I Make It Start On Boot?
/etc/init.d/<script-name> start
How Do I Make Something Start On Boot?
ls -lah /etc/init.d/ (to find out scriptname) rc-update add <script-name> default
How Do I Stop Something Starting On Boot?
ls -lah /etc/init.d/ (to find out scriptname) rc-update del <script-name> default
Links
http://www.littlefield.info/linux/gentoo_linux_faqs.txt
Determine Filesystem Formatting Type
blkid /dev/sda4 /dev/sda4: UUID="be475869-5637-447b-a3cf-6a744cd813ce" TYPE="ext4" blkid /dev/sdb1 /dev/sdb1: LABEL="4GB-USB" UUID="17D0-8533" TYPE="vfat"
Turn Off Hardware Beep Sound For Terminal
http://www.cyberciti.biz/faq/how-to-linux-disable-or-turn-off-beep-sound-for-terminal/
CUPS Print Server
Error - lpstat: Unable to connect to server
Edit the file /etc/cups/client.conf and change the ServerName line to your full hostname...
echo "ServerName `hostname -f`" > /etc/cups/client.conf
Fixing Various RAID Devices Error
If you see this error when starting up:-
* Starting up RAID devices ... [ !! ]
And you see this error when shutting down:-
mdadm: fail to stop array /dev/md0: Device or resource busy
...then remove the word raid from the RC_VOLUME_ORDER variable in /etc/conf.d/rc
RC_VOLUME_ORDER="evms lvm dm"
Change Preferred Minor MD Superblock On Software RAID Hard Disk
A hard disk drive failure on one of my servers prompted a manual software RAID 1 check and resync. Using good old SystemRescueCD, this was done but in doing so it inadvertently changed the preferred minor md superblock number on the array's hard disk drives from 3 to 124.
mdadm --misc --examine /dev/sda3 |grep 'Preferred Minor' Preferred Minor : 124
To fix this, stop the array and reassemble it again but update the superblock as it runs. Make sure you declare which hard disk drive partitions you are using as you assemble:-
mdadm --verbose --misc --stop /dev/md124 mdadm --verbose --assemble --update=super-minor --run /dev/md3 /dev/sda3 /dev/sdb3
To check it has worked, run the following 2 commands:-
mdadm --misc --examine /dev/sda3 |grep 'Preferred Minor' Preferred Minor : 3
cat /proc/mdstat
md3 : active raid1 sdb3[0] sda3[1]
10490368 blocks [2/2] [UU]
How to Quickly Find and Replace Text Across Multiple Files with One Command
perl -pi -w -e 's/SEARCH_FOR/REPLACE_WITH/g;' *.txt
[RFC/RFT PATCH v3] sched: automated per tty task groups
This patch gives you the much talked about peformance boost... and yes, wow. :-)
You have to install the very latest kernel sources, then follow the instructions at http://forums.gentoo.org/viewtopic-t-852922.html
Here are my notes...
vaio-sabayon ~ # emerge =sys-kernel/vanilla-sources-2.6.37_rc2 vaio-sabayon ~ # eselect kernel list Available kernel symlink targets: [1] linux-2.6.34-gentoo-r1 * [2] linux-2.6.35-gentoo-r10 [3] linux-2.6.36-gentoo [4] linux-2.6.37-rc2 vaio-sabayon ~ # eselect kernel set 4 vaio-sabayon ~ # cd /usr/src/ vaio-sabayon /usr/src # ll total 88K drwxr-xr-x 7 root root 4.0K 2010-11-17 23:08 . drwxr-xr-x 18 root root 4.0K 2010-06-17 04:35 .. -rw-r--r-- 1 root root 59K 2006-01-03 22:33 .config -rw-r--r-- 1 root root 0 2005-11-15 18:26 .keep lrwxrwxrwx 1 root root 16 2010-11-17 23:08 linux -> linux-2.6.37-rc2 drwxr-xr-x 24 root root 4.0K 2010-06-25 12:55 linux-2.6.34-gentoo-r1 drwxr-xr-x 24 root root 4.0K 2010-10-19 10:51 linux-2.6.35-gentoo-r10 drwxr-xr-x 23 root root 4.0K 2010-10-22 20:47 linux-2.6.36-gentoo drwxr-xr-x 23 root root 4.0K 2010-11-17 23:05 linux-2.6.37-rc2 drwxr-xr-x 7 root root 4.0K 2009-10-07 16:24 rpm vaio-sabayon /usr/src # cd linux vaio-sabayon /usr/src/linux # ll total 484K drwxr-xr-x 23 root root 4.0K 2010-11-17 23:05 . drwxr-xr-x 7 root root 4.0K 2010-11-17 23:08 .. drwxr-xr-x 26 root root 4.0K 2010-11-17 23:05 arch drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 block -rw-r--r-- 1 root root 19K 2010-10-20 21:30 COPYING -rw-r--r-- 1 root root 92K 2010-10-20 21:30 CREDITS drwxr-xr-x 3 root root 4.0K 2010-11-17 23:05 crypto drwxr-xr-x 87 root root 12K 2010-11-17 23:05 Documentation drwxr-xr-x 89 root root 4.0K 2010-11-17 23:05 drivers drwxr-xr-x 37 root root 4.0K 2010-11-17 23:05 firmware drwxr-xr-x 70 root root 4.0K 2010-11-17 23:05 fs -rw-r--r-- 1 root root 936 2010-10-20 21:30 .gitignore drwxr-xr-x 20 root root 4.0K 2010-11-17 23:05 include drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 init drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 ipc -rw-r--r-- 1 root root 2.5K 2010-11-17 23:04 Kbuild -rw-r--r-- 1 root root 252 2010-11-17 23:04 Kconfig drwxr-xr-x 8 root root 4.0K 2010-11-17 23:05 kernel drwxr-xr-x 7 root root 4.0K 2010-11-17 23:05 lib -rw-r--r-- 1 root root 4.0K 2010-10-20 21:30 .mailmap -rw-r--r-- 1 root root 179K 2010-11-17 23:04 MAINTAINERS -rw-r--r-- 1 root root 51K 2010-11-17 23:04 Makefile drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 mm drwxr-xr-x 52 root root 4.0K 2010-11-17 23:05 net -rw-r--r-- 1 root root 18K 2010-11-17 23:04 README -rw-r--r-- 1 root root 3.3K 2010-10-20 21:30 REPORTING-BUGS drwxr-xr-x 9 root root 4.0K 2010-11-17 23:05 samples drwxr-xr-x 13 root root 4.0K 2010-11-17 23:05 scripts drwxr-xr-x 8 root root 4.0K 2010-11-17 23:05 security drwxr-xr-x 21 root root 4.0K 2010-11-17 23:05 sound drwxr-xr-x 5 root root 4.0K 2010-11-17 23:05 tools drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 usr drwxr-xr-x 3 root root 4.0K 2010-11-17 23:05 virt vaio-sabayon /usr/src/linux # cp /home/paully/Desktop/sched.patch . `/home/paully/Desktop/sched.patch' -> `./sched.patch' vaio-sabayon /usr/src/linux # ll total 496K drwxr-xr-x 23 root root 4.0K 2010-11-17 23:08 . drwxr-xr-x 7 root root 4.0K 2010-11-17 23:08 .. drwxr-xr-x 26 root root 4.0K 2010-11-17 23:05 arch drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 block -rw-r--r-- 1 root root 19K 2010-10-20 21:30 COPYING -rw-r--r-- 1 root root 92K 2010-10-20 21:30 CREDITS drwxr-xr-x 3 root root 4.0K 2010-11-17 23:05 crypto drwxr-xr-x 87 root root 12K 2010-11-17 23:05 Documentation drwxr-xr-x 89 root root 4.0K 2010-11-17 23:05 drivers drwxr-xr-x 37 root root 4.0K 2010-11-17 23:05 firmware drwxr-xr-x 70 root root 4.0K 2010-11-17 23:05 fs -rw-r--r-- 1 root root 936 2010-10-20 21:30 .gitignore drwxr-xr-x 20 root root 4.0K 2010-11-17 23:05 include drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 init drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 ipc -rw-r--r-- 1 root root 2.5K 2010-11-17 23:04 Kbuild -rw-r--r-- 1 root root 252 2010-11-17 23:04 Kconfig drwxr-xr-x 8 root root 4.0K 2010-11-17 23:05 kernel drwxr-xr-x 7 root root 4.0K 2010-11-17 23:05 lib -rw-r--r-- 1 root root 4.0K 2010-10-20 21:30 .mailmap -rw-r--r-- 1 root root 179K 2010-11-17 23:04 MAINTAINERS -rw-r--r-- 1 root root 51K 2010-11-17 23:04 Makefile drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 mm drwxr-xr-x 52 root root 4.0K 2010-11-17 23:05 net -rw-r--r-- 1 root root 18K 2010-11-17 23:04 README -rw-r--r-- 1 root root 3.3K 2010-10-20 21:30 REPORTING-BUGS drwxr-xr-x 9 root root 4.0K 2010-11-17 23:05 samples -rw-r--r-- 1 root root 11K 2010-11-17 23:08 sched.patch drwxr-xr-x 13 root root 4.0K 2010-11-17 23:05 scripts drwxr-xr-x 8 root root 4.0K 2010-11-17 23:05 security drwxr-xr-x 21 root root 4.0K 2010-11-17 23:05 sound drwxr-xr-x 5 root root 4.0K 2010-11-17 23:05 tools drwxr-xr-x 2 root root 4.0K 2010-11-17 23:05 usr drwxr-xr-x 3 root root 4.0K 2010-11-17 23:05 virt vaio-sabayon /usr/src/linux # cat sched.patch | patch -p1 patching file include/linux/sched.h Hunk #3 succeeded at 1935 (offset -1 lines). patching file kernel/sched.c Hunk #2 succeeded at 616 (offset 10 lines). Hunk #3 succeeded at 2020 (offset 10 lines). Hunk #4 succeeded at 7967 (offset -17 lines). Hunk #5 succeeded at 8497 (offset -17 lines). Hunk #6 succeeded at 8522 (offset -17 lines). patching file kernel/fork.c patching file drivers/tty/tty_io.c patching file kernel/sched_autogroup.h patching file kernel/sched_autogroup.c patching file kernel/sysctl.c patching file init/Kconfig patching file Documentation/kernel-parameters.txt vaio-sabayon /usr/src/linux # make && make modules_install vaio-sabayon ~ # cp arch/x86/boot/bzImage /boot/kernel-2.6.37-rc2 vaio-sabayon ~ # cp System.map /boot/System.map-2.6.37-rc2 vaio-sabayon ~ # cp .config /boot/config-2.6.37-rc2 vaio-sabayon ~ # reboot vaio-sabayon ~ # cat /proc/sys/kernel/sched_autogroup_enabled 1 vaio-sabayon ~ # uname -r 2.6.37-rc2
Oh yeah... very nice - much faster and smoother - seriously :-)
Bluetooth Headset With Skype
echo "net-wireless/bluez test-programs" >> /etc/portage/package.use emerge -pv net-wireless/bluez emerge -q net-wireless/gnome-bluetooth
http://en.gentoo-wiki.com/wiki/Bluetooth_headset
ERROR: Gnome: DBus error org.gtk.Private
Open gconf-editor, go to apps>nautilus>preferences and uncheck media_automount and media_automount_open
Manually Fixing Broken Portage
http://www.gentoo.org/proj/en/portage/doc/manually-fixing-portage.xml
Tinderbox Precompiled Packages
http://tinderbox.dev.gentoo.org/default-linux/amd64/sys-apps/
Getting Beautiful Fonts
http://www.kev009.com/wp/2009/12/getting-beautiful-fonts-in-gentoo-linux/
Verbose Check A Disk Drive
fsck.ext3 -f -v -C0 -p /dev/sdc1
Shoreline Firewall (Shorewall) Tips
To list the connections from an IP address.
conntrack -L -s 192.168.0.103
To drop all the connections from an IP address.
conntrack -D -s 192.168.1.102
It can take up to 1 minute to drop all of them, so be patient. You can then restart shorewall and be certain any NEW connections (not ESTABLISHED ones) will be accounted for.
How To Read IPTables Logs
Jul 22 20:43:22 fw kernel: IN=eth2 OUT= MAC=xxx SRC=srcip DST=dstip LEN=40 TOS=0x00 PREC=0x00 TTL=52 ID=21125 PROTO=TCP SPT=5653 DPT=3513 WINDOW=1400 RES=0x00 ACK URGP=0 IN = Input interface OUT = Output interface MAC = Ethernet hardware address (aka MAC address) SRC = Source IP address DST = Destination IP address LEN = Packet length TOS = Type of Service (for packet prioritization) PREC = Precedent bits TTL = Time to Live ID = Packet identifier PROTO = Protocol (eg. TCP, UDP) SPT = Source port DPT = Destination port WINDOW = Size of TCP window RES = Reserved bits ACK = Acknowledge bit set URGP = Urgent packet Apr 4 12:30:02 gateway klogd: Shorewall:net_dnat:DNAT:IN=eth2 OUT= MAC=14:d6:4d:52 SRC=123.456.789.0 DST=10.0.0.2 LEN=60 TOS=0x00 PREC=0x00 TTL=50 ID=32698 DF PROTO=TCP SPT=57674 DPT=11350 WINDOW=5840 RES=0x00 SYN URGP=0
Rsync From Linux EXT Filesystem To Windows / MS-DOS VFAT Filesystem
You will get various errors when copying from a Linux to a Windows filesystem.
2012/04/30 00:00:11 [14252] building file list 2012/04/30 00:00:11 [14252] .d...pog... home/ 2012/04/30 00:00:11 [14252] rsync: chown "/media/sda1/home/" failed: Permission denied (13)
Add the following options to stop the errors.
rsync -a --no-o --no-p --no-g --safe-links --modify-window 1 --stats /home/ /media/sda1/home/
http://www.monperrus.net/martin/backup+from+ext3+to+vfat+with+rsync
How to speed up X11 forwarding in SSH
http://xmodulo.com/2013/07/how-to-speed-up-x11-forwarding-in-ssh.html
cat ~/.ssh/config
Host remote_host.com Compression yes ForwardX11 yes Ciphers blowfish-cbc,arcfour
SSH Login Without Password Using ssh-keygen & ssh-copy-id
ssh-keygen -t rsa (and choose no password) ssh-copy-id -i ~/.ssh/id_rsa.pub user@remote-host ssh user@remote-host
SSH Login With 1 Password Using Keychain
As root...
emerge keychain
As normal user...
keychain ~/.ssh/id_rsa . ~/.keychain/$HOSTNAME-sh . ~/.keychain/$HOSTNAME-sh-gpg
Add the above 3 lines to your BASH shell startup file...
nano ~/.bashrc
Now when you login to a server, it will not ask you for your key passphrase...
ssh user@server.name
Rsync Over SSH
Copy from remote (on a non-standard port) to local, just 1 file...
/usr/bin/rsync -v -h -a --include=filename.ext --exclude=* -e "ssh -p 2222" user@123.456.789.0:~/remotedir/ ~/localdir/
Copy from local to remote
/usr/bin/rsync -a -e ssh ~/my/local/folder/ username@192.168.0.x:~/path/to/folder/
Copy from local to remote, with extra options (e.g. disable host checking) wrapped with ' single quotes
/usr/bin/rsync -a -e 'ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no' ~/my/local/folder/ username@192.168.0.x:~/path/to/folder/
Copy from remote to local
/usr/bin/rsync -a -e ssh username@192.168.0.x:~/path/to/folder/ ~/my/local/folder/
See Limit Bandwidth below...
Spaces In File Or Folder Name
If you want to rsync a file or folder with spaces in the file name, you have to escape and put double-quotes around both the local and remote shell parts of the command.
e.g.
/usr/bin/rsync -a -e ssh "username@192.168.0.x:\"~/path/to/folder/with spaces\"" ~/my/local/folder/
e.g.
rsync -v -a --exclude='*FLAC*' -e ssh "username@server:\"Music/Dream Theater\"" /home/username/Music/
Limit Bandwidth
Option 1 - use the rsync option to limit I/O bandwidth, in KB per second...
/usr/bin/rsync --bwlimit=2000 -a -e ssh ~/my/local/folder/ user@remote:~/path/to/folder/
https://www.dalemacartney.com/2012/09/08/bandwidth-throttling-with-rsync/
Option 2 - use the lightweight userspace bandwidth shaper trickle, also in KB per second...
/usr/bin/rsync -a -e trickle -d 2000 ssh ~/my/local/folder/ user@remote:~/path/to/folder/
Option 3 - use both rsync and trickle maybe, just remember that trickle has up and down limits...
/usr/bin/rsync --bwlimit=2000 -a -e trickle -d 2000 ssh ~/my/local/folder/ user@remote:~/path/to/folder/
How to disable SSH host key checking
ssh -o LogLevel=quiet -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no peter@192.168.0.100
http://linuxcommando.blogspot.co.uk/2008/10/how-to-disable-ssh-host-key-checking.html
Overlay Names
If you have a local overlay, you can name it so that eix uses it properly in results. Just create the file repo_name in a sub-directory called 'profiles'.
mkdir -p /usr/local/portage/profiles echo "local" > /usr/local/portage/profiles/repo_name
Now when you run eix-update, it shows the local overlay name.
eix-update
Reading Portage settings ..
Building database (/var/cache/eix) ..
[0] "gentoo" /usr/portage/ (cache: metadata-md5-or-flat)
Reading category 154|154 (100%) Finished
[1] "local" /usr/local/portage (cache: parse|ebuild*#metadata-md5#metadata-flat#assign)
Reading category 154|154 (100%) EMPTY!
Applying masks ..
Calculating hash tables ..
Writing database file /var/cache/eix ..
Database contains 15543 packages in 154 categories.
Intel i915 Video Kernel Mode Setting - KMS
How To Disable
i915.modeset=0
Use IPTables Firewall To Block An IP Address
/sbin/iptables -I INPUT -s {IP-HERE} -j DROP
