pantz.org banner
Disabling GNU Screen lock screen
Posted on 03-28-2015 20:05:10 UTC | Updated on 04-01-2015 23:30:01 UTC
Section: /software/screen/ | Permanent Link

Lock screen

For the impatient or TLDR ... Put: export LOCKPRG='/bin/true' in your .bashrc. Kill all screen sessions and start a new one. Ctrl-a x should now do nothing. Also, a nice fellow named Brian suggested I just unbind the x key. I thought it was a good idea. Just put "bind ^x" and "bind x" in your .screenrc. Lot's of different ways to do the same thing. Re-binding is the better way though.

I have been using GNU Screen for a while now. I usually create multiple new windows (Ctrl-a c) every day. Then I flip back and forth between the multiple screens (Ctrl-a n) or just toggle between the last 2 windows used (Ctrl-a a). Sometimes my finger slips and I hit Ctrl-a x which provides you with a password prompt. This is GNU Screen's lockscreen function.

Normal and not so normal

Normally you just enter your user password and the screen will unlock. Screen is using /local/bin/lck or /usr/bin/lock by default. This is all fine and dandy if you have a user account password to enter. If you have servers that only use SSH keys and don't use passwords you will have no valid password to enter. In other words you are stuck at this lock screen. One way around it is to login to the same machine and re-attach to the same screen session (normally "screen -r" if you have only 1 session open). Then kill the session with the lock screen. This is annoying to have to do.

Disabling lock screen

I wanted to be able to just disable the lockscreen setting and be done with this. Looking at the man page it shows there is no option to turn this off. So you have to go around it in a way. The way I found to do this on machines without user passwords is to disable the terminal lock program by setting the environment variable LOCKPRG to "/bin/true". For BASH put export LOCKPRG='/bin/true' in your .bashrc. Kill all screen sessions and start a new one. Ctrl-a x should now do nothing.

Warning about disabling LOCKPRG

For security sake be careful about disabling your LOCKPRG. /bin/true disables all terminal screen locking, so if you use some program that uses whatever is in the LOCKPRG variable it essentially disables it.

Reddit!

Related stories


RSS Feed RSS feed logo

About


3com

3ware

alsa

alsactl

alsamixer

amd

android

apache

areca

arm

ati

auditd

awk

badblocks

bash

bind

bios

bonnie

cable

carp

cat5

cdrom

cellphone

centos

chart

chrome

chromebook

cifs

cisco

cloudera

comcast

commands

comodo

compiz-fusion

corsair

cpufreq

cpufrequtils

cpuspeed

cron

crontab

crossover

cu

cups

cvs

database

dbus

dd

dd_rescue

ddclient

debian

decimal

dhclient

dhcp

diagnostic

diskexplorer

disks

dkim

dns

dos

dovecot

drac

dsniff

dvdauthor

e-mail

echo

editor

emerald

ethernet

expect

ext3

ext4

fat32

fedora

fetchmail

fiber

filesystems

firefox

firewall

flac

flexlm

floppy

flowtools

fonts

format

freebsd

ftp

gdm

gmail

gnome

google

greasemonkey

greylisting

growisofs

grub

hacking

hadoop

harddrive

hba

hex

hfsc

html

html5

http

https

hulu

idl

ie

ilo

intel

ios

iperf

ipmi

iptables

ipv6

irix

javascript

kde

kernel

kickstart

kmail

kprinter

krecord

kubuntu

kvm

lame

ldap

linux

logfile

lp

lpq

lpr

maradns

matlab

memory

mencoder

mhdd

mkinitrd

mkisofs

moinmoin

motherboard

mouse

movemail

mplayer

multitail

mutt

myodbc

mysql

mythtv

nagios

nameserver

netflix

netflow

nginx

nic

ntfs

ntp

nvidia

odbc

openbsd

openntpd

openoffice

openssh

openssl

openvpn

opteron

parted

partimage

patch

perl

pf

pfflowd

pfsync

photorec

php

pop3

pop3s

ports

postfix

power

procmail

proftpd

proxy

pulseaudio

putty

pxe

python

qemu

r-studio

raid

recovery

redhat

router

rpc

rsync

ruby

saltstack

samba

schedule

screen

scsi

seagate

seatools

sed

sendmail

sgi

shell

siw

smtp

snort

solaris

soundcard

sox

spam

spamd

spf

spotify

sql

sqlite

squid

srs

ssh

ssh.com

ssl

su

subnet

subversion

sudo

sun

supermicro

switches

symbols

syslinux

syslog

systemd

systemrescuecd

t1

tcpip

tcpwrappers

telnet

terminal

testdisk

tftp

thttpd

thunderbird

timezone

ting

tls

tools

tr

trac

tuning

tunnel

ubuntu

unbound

vi

vpn

wget

wiki

windows

windowsxp

wireless

wpa_supplicant

x

xauth

xfree86

xfs

xinearama

xmms

youtube

zdump

zeromq

zic

zlib