The module uses a shared memory cache to store recently resolved hostnames. By default the cache uses 200k of shared ram, and will cache up to 1024 ip/host pairs.
mod_dns dramatically improves resolver performance, making it possible to resolve hostnames in real-time even for busy webservers. It also has a built-in performance summary page.
Usage: rtf2ps <input.rtf> [output.ps]
It allows for in-place (re)compression, for example. For large multi-part archives you may not otherwise have been able to uncompress and recompress the data again because of lack of temporary disk space.
If the output from the pipeline is bigger than the file, the program will continue to allocate memory to buffer the difference, it will never over-write data in the file before reading it.
README
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Usage: rewrite [-v] [-r "s/old/new/"] files.. "cat|cat"
-v verbose output (show compression ratios)
s/old/new/ sed expression for renaming files
files.. input file names to rewrite through pipeline
"cat|cat" pipeline expression to rewrite file through
If SIGHUP is received, the file will be reopened, allowing for log rotation [see logrotate(8) on RH.] The log file will only be reopened if flog detects that rotation has occurred (ie, old file gone or inode changed). flog is extremly small (less than 500 bytes memory footprint.)
Usage: pipeline| ./flog [options] {logfile|-} # SIGHUP will reopen logfile (v1.8)
-t prepend each line with "YYYYMMDD;HH:MM:SS: "
-T <format> prepend each line with specified strftime(3) format
-l <number> log file length limit (force truncation)
-z zap (truncate) log if disk gets full (default: grow buffer)