Category Archives: Linux

Booting HP-UX in Single-User Mode To boot to HP-UX in single-user mode, follow these steps: 1. At the BCH Main Menu, enter command or menu> bo pri. The following message displays: Interact with IPL (Y, N, or Cancel)?> 2. To … Continue reading →

If you want to edit ulimit variables that return with the ulimit -a command: You can do it temporarily from the command line with the ulimit command, but to make it permanent, you have to put the change in /etc/security/limits.conf. … Continue reading →

1) Set the password expiry date for username (*-M will update both “Password expires” and “Maximum number of days between password change”): chage -M number-of-days username *If the password expiry date is reached and user doesn’t change his password, the … Continue reading →

[root@vickistan ~]# cat /etc/redhat-release CentOS release 6.6 (Final) If that doesn’t produce results, try this: [root@vickistan ~]# lsb_release -i -r Distributor ID: RedHatEnterpriseServer Release: 5.5

Ubuntu: dpkg -s PKGNAME Red Hat: rpm -q PKGNAME Arch Linux: pacman -Si PKGNAME

This is how to stop a running service temporarily: # systemctl stop servicename.service This stops it from starting at boot, but does not stop a running service: # systemctl disable servicename.service That also prevents it from being started by anything … Continue reading →

Yum Server Side Take a look at the available repositories with the repolist option to yum: $yum repolist Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile epel/metalink | 13 kB 00:00 * base: mirror.symnds.com * epel: epel.mirror.constant.com * extras: … Continue reading →

rpm -V output: S file Size differs M Mode differs (includes permissions and file type) 5 MD5 sum differs D Device major/minor number mismatch L readLink(2) path mismatch U User ownership differs G Group ownership differs T mTime differs

In Ubuntu and Debian: By default, each user in Debian GNU/Linux is given a corresponding group with the same name. In RedHat/CentOS,Gentoo If not specified, the behavior of useradd will depend on the USERGROUPS_ENAB variable in /etc/login.defs. If this variable … Continue reading →