How to find current runlevel on unix system
Linux provides a utility called runlevel but "who -r" is a portable solution which is available across various Unixes.
Category: Unix Admin
SunOS : List dynamic libraries loaded by a running process or core
While ldd can provide the dynamic library location for a binary, pldd can provide which libraries were really used (both for a running process and also for the ...
Most often used Network Sniffer flags for tcpdump and snoop
Selecting interface, capturing full data, writing to a file etc. are some of the most often used Packet capture flags.
How to find number of CPUs on unix system
CPU information can be retrieved via /usr/sbin/psrinfo on SunOS while it is available in /proc/cpuinfo on Linux and use hinv on IRIX. Other unix commands like g...
screen : Run processes on re-attachable virtual terminals
On unix a utility called "screen" provides a quick and easy way to run commands on virtual terminals which can be re-attached later as and when needed even when...
bash : Signal Handling
Bash provides "trap" function to trap signals and define handlers.
find broken symlinks
Using find and test commands you can search for the dangling or broken soft links on a Unix system.
bash : Automate add/modify/delete of cron jobs from a script
Output redirections using pipes can be used to combine multiple crontab commands to install new cron job or to modify or delete old cron jobs without using any ...
bash : run command on find results
"find" command allows "-exec command ;" flag to support running a command on result. For the shorter output from find "xargs" can be used.
bash : brace expansion for automatic substitution
Bash expands a list of strings separated by commas with in braces to a list of strings separated by spaces. This can be used to process files without whole lot ...