ubuntu: add user
by prettyscripts on 2009-10-15 10:23:11 • Leave a comment »
there are 2 commands to add user: userad and adduser. (the commands could be the same for other linux.)
adduser is easier to use. it prompts for relevant information.
to allow new user to run sudo, run:
$ usermod -G admin <username> more »
vi: insert shell output
by prettyscripts on 2009-08-10 11:41:23 • Leave a comment »
to run shell command while in vi:
:!command
to insert output from shell command after the cursor:
:r!command more »
fedora: disable selinux
by prettyscripts on 2009-04-28 02:41:32 • Leave a comment »
selinux stands for security-enhanced linux. it’s probably too secured and caused a lot of file errors. i always turn it off. the following applies to fedora core 10. it’s probably more or less the same for previous versions or other linux platforms.… more »
php: image manipulation
by prettyscripts on 2008-12-04 10:57:59 • Leave a comment »
the gd image library provide functions to manipulate image files. on some installations, this does not come as default and needs to be installed. on fedora, the command is$ yum install php-gd on ubuntu, the command is$ sudo apt-get install php5… more »
unix time to human readable format
by prettyscripts on 2008-07-18 10:58:05 • Leave a comment »
some log files such as squid log uses uses unix time as timestamp, which looks like some random number generated number. you can use this online conversion tool. to run from unix command line, to convert to human readable format, eg in yyyy-mm-dd hh:… more »
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