Tags » SysAdmin

Raspberry Pi - Drivers TL-WN725N

Como ya hemos hablado en este blog, una de las maneras mas practicas de conectar nuestra Raspberry a la red y a internet es mediante WiFi, ya que así tenemos esa libertad de movernos sin problemas de cables. 336 more words

Raspberry Pi

ZFS on Linux 'insufficient replicas' panic

I run a lovely little HP N54L MicroServer at home to keep all my important bits. It’s been a faithful companion for many years across two continents. 535 more words


Using Arch Linux's pacman/ABS/AUR

  • pacman combines a simple binary package format with an easy-to-use build system. Written in the C programming language and uses the .pkg.tar.xz package format.
# update package databases
$ pacman -Sy

# search all package, or just installed
$ pacman -Ss <package> or pacman -Qs <package>
(add color, either use 'pacsearch <package>' a perl wrapper for 'pacman -Ss' or)
$ nano /etc/pacman.conf

# query all package info, or just installed package info
$ pacman -Si <package> or pacman -Qi <package>
# lists all files associated with a package
$ pacman -Ql <package>
# list package disk usage
$ pacsysclean

# download/install
$ sudo pacman -S <package>
# just download
$ sudo pacman -Sw <package>
# install locally, used in AUR
$ sudo pacman -U <package_path>

# list packages out of date
$ pacman -Qu
# install packages out of date
$ sudo pacman -Syu

# list downloaded packages
$ ls /var/cache/pacman/pkg | grep <package>
# revert to a package in your cache
$ pacman -U <path_to_cached_file>
# rollback using https://wiki.archlinux.org/index.php/Arch_Rollback_Machine
$ pacman -U http://seblu.net/a/arm/2013/08/31/extra/os/x86_64/apache-2.2.25-1-x86_64.pkg.tar.xz
# same using downgrade/downgrader
$ downgrade <package> | downgrader <package>

# remove a package, leaves dependencies
$ sudo pacman -R <package>
# remove packages and orphan dependencies
$ sudo pacman -Rs <package>

# mirrors by speed, see https://wiki.archlinux.org/index.php/Mirrors
$ sudo cp /etc/pacman.d/mirrorlist{,.backup}
$ sudo rankmirrors -n 6 /etc/pacman.d/mirrorlist.backup > /etc/pacman.d/mirrorlist
$ sudo pacman -Syy

# pacman frontends, https://wiki.archlinux.org/index.php/Pacman_GUI_Frontends
# note: if using putty change translation to latin1
$ sudo pacman -S pcurses 
$ yaourt yaourt-gui

# tips, see https://wiki.archlinux.org/index.php/Pacman_tips and https://wiki.archlinux.org/index.php/System_maintenance
# remove orphan packages
$ pacman -Rns $(pacman -Qtdq)
# reinstall all packages (except foreign)
# pacman -Qenq | pacman -S -
# remove all the cached packages not installed
$ sudo pacman -Sc
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Using grep and its alternatives for source code (ack/ag/git-grep/cgrep/sgrep/jq/xgrep) and fuzzy searches (agrep/tre)

grep@man print lines matching a pattern. In addition, two variant programs egrep and fgrep are available. egrep is the same as grep -E. fgrep is the same as grep -F. 1,450 more words

Raspberry Pi - Multiples redes WiFi

En uno de nuestros post anteriores hablamos de como configurar nuestra Raspi para conectarse de manera automática a la red utilizando un adaptador USB-WiFi ( 361 more words

Raspberry Pi

bug CentOS-6.6

beberapa waktu lalu saya setelah saya instal ulang sebuah server dengan OS CentOS-6.5 dan update ke Centos-6.6 ada hal aneh yang saya rasakan
sebagai bug, yaitu saat saya ketik command setup dan memilih firewall itu tidak keluar tampilan nya dan malah muncul error seperti ini… 87 more words


Howto add IP failover to Linux (using UCARP)

  • ucarp allows hosts to share common IP addresses in order to provide automatic failover of an address from one machine to another. Its a userland implementation of…
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