Various

From Systerserver

Contents 1 SCREEN 2 Midnight Commander FAQ 3 MC in the Mac OS X terminal 4 reset mysql root password 5 partition, format and label an external disk (hdd, usb, ...) 6 checks before rebooting 7 locales settings 8 generate random password 9 first things to install 10 finding information about your monitor 11 .htaccess 12 .robots.txt 13 BIOS to disk cylinder limit / boundry

SCREEN

• screen -S (to start a new screen, and giving it a title/name)
• CTRL+A+D to detach
• screen -r to reattach
• screen -x to attach to a session that is attached, ie let many users into one screen simultaneously
• http://www.linux.com/learn/tutorials/285795-taking-command-of-the-terminal-with-gnu-screen-

Midnight Commander FAQ

http://www.ibiblio.org/mc/FAQ

MC in the Mac OS X terminal

• if you want FN10 (function key 10) to quit, press ESC and 0
• likewise ESC 3 to View (FN3), etc....

reset mysql root password

• /etc/init.d/mysql stop
• /usr/bin/mysqld_safe --skip-grant-tables &
• mysql --user=root mysql
• update user set Password=PASSWORD('BlaBla') WHERE User='root';
• flush privileges;
• exit
• fg and Ctl+C to foreground the mysql service which was running in safe-mode and kill it
• /etc/init.d/mysql start
• mysql -u root -p BlaBla
• exit
• ps above password is not used anywhere :)
• pps you need to use sudo or be root to do above

partition, format and label an external disk (hdd, usb, ...)

• sudo su
• partitioning: fdisk
• formatting: mkfs.ext3 /dev/sdb1 or mkfs -t vfat -F 32 /dev/hdb1 or mkfs.vfat -F 32 /dev/hdb1
• e2label /dev/sdb1 stick
• tune2fs?

checks before rebooting

• to see which files are open / in use: smbstatus
• which services are running and need to be running again after reboot: netstat -paten
• who's logged on: lsof |grep home
• what's mounted; after reboot see if the same are mounted again.
• if ever you do a fscheck, run it in screen.

locales settings

• dpkg-reconfigure locales
• en_US.UTF-8-> Unicode for all regions, mostly in 1-3 Octets (new de facto standard)
• en_US ISO-8859-1 -> western Europe (de facto old standard)
• en_US.ISO-8859-15 -> western Europe with euro

generate random password

strings /dev/urandom | grep -o 'alnum:' | head -n 12 | tr -d '\n'; echo

first things to install

I've just installed Debian and still need....

• aptitude, ssh, sudo
• vim, screen, mc, mtr, iptraf
• logcheck, cron-apt, denyhosts, failtoban
• harden-servers and harden-clients

finding information about your monitor

• install xresprobe, then run for eg:
• ddcprobe | grep monitorrange

.htaccess

• is the default name of a directory-level configuration file that allows for decentralized management of web server configuration.

.robots.txt

• developed in 1994
• the Robot Exclusion Standard or Protocol, is a convention to prevent web spiders and robots from accessing all or part of a website which is otherwise publicly viewable.

BIOS to disk cylinder limit / boundry

• 512 cylinder - overcome in mid-94
• 1024 cylinder
• 4096 cylinder (1.97 GB) barrier - was overcome after 1996
• 6322 cylinder barrier (very uncommon)
• Int13h (7.88 GB) barrier - very common; a BIOS upgrade may be available
• 65536 cylinder (31.5 GB) barrier - fixed by June 1999
• ATA28 (128 GB) barrier - found in most systems before 2002