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 # pbs_do
 Create PBS jobs from the standard input.
+
+The inspiration for  `pbs_do` is the unix `xargs` command. `pbs_do` reads a list of arguments from the standard input, deliminated by blanks and creates a PBS file(s) to process each argument with a user specified `command`. Various options are available to specify the compute resources to request for each job as well as to manage parallel processing whithin jobs.
+
+# Usage
+```
+usage: pbs_do [options] command [initial-arguments ...]
+
+Create PBS jobs from the standard input.
+
+positional arguments:
+  command
+
+optional arguments:
+  -h, --help            show this help message and exit
+  -a--arg-file file     Read items from file instead of standard input.
+  -I replace-str        replace occurrences of replace-str in the
+                        initial_arguments with input.
+  --resub pattern repl  replace occurrences of replace-str in the input with
+                        re.sub(patten, repl, input)
+  -r regex              only build commands from inputs matching regex
+  -o                    omit inputs matching regex instead
+  --deliminator regex   Deliminator used to tokenize input. Default is the
+                        regex "\s+".
+  -n MAX_ARGS, --max-args MAX_ARGS
+                        Use at most max-args arguments per command line.
+  --noArgs              Don't read arguments from stdin. Just construct pbs
+                        file from command.
+  -f --dontCheck        Skip check that each argument is a file that exists.
+  -g, --go              Should jobs be submitted? If this flag is not
+                        supplied, program will be a dry run. Required system
+                        resources will be printed but jobs will not be
+                        submitted.
+  --writeStdout         Write text file with stdout for each process?
+  -v, --verbose         Verbose output.
+  -j NJOB, --nJob NJOB  Specify number of jobs to split into.
+  --shell SHELL         Specify the shell to use in PBS files. Default is the
+                        value of $SHELL
+  -P N_CHILD_PROC, --nProc N_CHILD_PROC
+                        Number of child procecies to create in each PBS job.
+                        Unless specified, this is the same as the value used
+                        for ppn.
+  -p PPN, --ppn PPN     Number of processors to request per PBS job. Default
+                        is the smaller of 4 and the number of args.
+  -m MEM, --mem MEM     Amount of memory to allocate per PBS job in gb.
+                        Default is 4 times the number of processors per job.
+  -w WALLTIME, --walltime WALLTIME
+                        Walltime per job in the format hh:mm:ss. Default is
+                        12:00:00.
+  --debug {none,pdb,pudb}
+                        Start the main method in the selected debugger.
+```
+
+# Examples
+
+Read a list of links from `links.txt` and create a PBS job to retrieve them with `wget`.
+```
+$ cat links.txt | pbs_do -f wget
+```