波少散记

apt-get update 出现 这种错误 Reading package lists… Done W: There is no public key available for the following key IDs: 7638D0442B90D010 W: There is no public key available for the following key IDs: 7638D0442B90D010 W: There is no public key available for the following key IDs: 9D6D8F6BC857C906 解决方法 apt-get install debian-keyring debian-archive-keyring apt-get update

碳粉清零： 1、打开前盖 2、按清除键显示跟换硒鼓不理它，马上再按“启用”键，然后马上按“00”。 过几秒就可以关前盖 就可以了 硒鼓清零： 1、打开前盖 2、按清除键显示跟换硒鼓 1是 2否 按1 过几秒就可以关前盖就可以了

Depends: init-system-helpers (>= 1.18~) but it is not installable E: Unable to correct problems, you have held broken packages. Working on debian wheezy… I added backports to my apt repo “deb http://ftp.de.debian.org/debian wheezy-backports main” and performed a “apt-get update”. Afterwards, the apt-get install docker-engine completed fine. Personally, I’m leaving backports commented out for now but in my conf as a reminder…

In Red Hat based distributions such as Fedora and CentOS, make use of a script called ‘chkconfig‘ to enable and disable the running services in Linux. For example, lets disable the Apache web server at the system startup. [avishek@tecmint]# chkconfig httpd off [avishek@tecmint]# chkconfig httpd –del In Debian based distributions such as Ubuntu, Linux Mint and other Debian based distributions use a script called update-rc.d. For example, to disable the Apache service at the system startup execute the following command. Here ‘-f’ option stands for force is mandatory. [avishek@tecmint]# update-rc.d -f a