Commands by ZungBang (2)

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Find an installed app

Tail a log-file over the network
it also works with the chrome browser. The alternative with tail and nc doesn't

backs up at the date today

Find the package that installed a command

Change permissions of every directory in current directory
"find . -type d -print0 | xargs -0 chmod 755" thanks masterofdisaster

determine if tcp port is open
for udp nmap -sU -p 80 hostname

Search some text from all files inside a directory

Introduction to user commands
Tested on debian and ubuntu. Translations could be useless, so "LANG=C man intro" is a better alternative.

ptree equivalent in HP-UX
By setting the UNIX95 variable in HP-UX the XPG4 mode is activated, you get new options for ps and other commands, for me the best way to use this is to create an alias named ptree in root profile: alias ptree='UNIX95=1 ps -eH'

List all active access_logs for currently running Apache or Lighttpd process
Ever logged into a *nix box and needed to know which webserver is running and where all the current access_log files are? Run this one liner to find out. Works for Apache or Lighttpd as long as CustomLog name is somewhat standard. HINT: works great as input into for loop, like this: $ for i in `lsof -p $(netstat -ltpn|awk '$4 ~ /:80$/ {print substr($7,1,index($7,"/")-1)}')| awk '$9 ~ /access.log$/ {print $9| "sort -u"}'` ; do echo $i; done Very useful for triage on unfamiliar servers!


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