The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
dbiprof – command-line client for DBI::ProfileData SynopsisSee a report of the ten queries with the longest total runtime in the profile dump file prof1.out: dbiprof prof1.outSee the top 10 most frequently run queries in the profile file dbi.prof (the default): dbiprof –sort countSee the same report with 15 entries: dbiprof –sort count –number 15DescriptionThis tool…
dbilogstrip – filter to normalize DBI trace logs for diff’ing SynopsisRead DBI trace file "dbitrace.log" and write out a stripped version to "dbitrace_stripped.log" dbilogstrip dbitrace.log > dbitrace_stripped.logRun "yourscript.pl" twice, each with different sets of arguments, with DBI_TRACE enabled. Filter the output and trace through "dbilogstrip" into a separate file for each run. Then compare using…
dbgen.pl – Random LDIF database creator Synopsisdbgen.pl [OPTIONS] -o output_file -n number DescriptionRandom LDIF database creator. Used to generate large LDIF files for use in testing the Directory Server. OptionsA summary of options is included below: -v Verbose output -q Quiet output -s suffix LDAP suffix. Default is ‘dc=example,dc=com’ -c CN naming style Naming style…
dbgen.pl – Random LDIF database creator Synopsisdbgen.pl [OPTIONS] -o output_file -n number DescriptionRandom LDIF database creator. Used to generate large LDIF files for use in testing the Directory Server. OptionsA summary of options is included below: -v Verbose output -q Quiet output -s suffix LDAP suffix. Default is ‘dc=example,dc=com’ -c CN naming style Naming style…
dbformmail – write a shell script that will send e-mail to many people Synopsisdbformmail [-m MECHANISM] format_file.txt DescriptionRead a “form mail” message from the file FORMAT_FILE.TXT, filling in underscore-preceded column-names with data. Output a shell script which will send each message through some mail transport MECHANISM. Do not use this program for evil or I…
dbfilevalidate – insure the source input is a well-formed Fsdb file Synopsis dbfilevalidate [-vc]DescriptionValidates the input file to make sure it is a well-formed fsdb file. If the file is well-formed, it outputs the whole file and exits with a good exit code. For invalid files, it exits with an error exit code and embedded…
dbfilestripcomments – remove comments from a fsdb file Synopsisdbfilestripcomments [-h] DescriptionRemove any comments in a file, including the header. This makes the file unreadable by other Fsdb utilities, but perhaps more readable by humans. With the -h option, leave the header. Options-h or –header Retain the header. This module also supports the standard fsdb options:…
dbfilepivot – pivot a table, converting multiple rows into single wide row Synopsisdbfilepivot [-e empty] -k KeyField -p PivotField [-v ValueField] DescriptionPivot a table, converting multiple rows corresponding to the same key into a single wide row. In a normalized database, one might have data with a schema like (id, attribute, value), but sometimes it’s…
dbfilediff – compare two fsdb tables Synopsis dbfilediff [-Eq] [-N diff_column_name] –input table1.fsdb –input table2.fsdbOR cat table1.fsdb | dbfilediff [-sq] –input table2.fsdbDescriptionDbfilediff compares two Fsdb tables, row by row. Unlike Unix diff(1), this program assumes the files are identical line-by-line and we compare fields. Thus, insertion of one extra row will result in all subsequent…
dbfilecat – concatenate two files with identical schema Synopsis dbfilecat –input A.fsdb [–input B.fsdb…]or echo A.fsdb | dbfilecat –xargsDescriptionConcatenate all provided input files, producing one result. We remove extra header lines. Inputs can both be specified with "–input", or one can come from standard input and the other from "–input". With "–xargs", each line of…
dbfilealter – alter the format of an Fsdb file, changing the row/column separator Synopsisdbfilealter [-c] [-F fs] [-R rs] [-Z compression] [column…] DescriptionThis program reformats a Fsdb file, altering the row ("-R rs") or column ("-F fs") separator. It verifies that this action does not violate the file constraints (for example, if spaces appear in…
dbfdump.pl – Dump the record of the dbf file Format dbfdump.pl [options] fileswhere options are –rs output record separator (default newline) –fs output field separator (default colon) –fields comma separated list of fields to print (default all) –undef string to print for NULL values (default empty) –memofile specifies unstandard name of attached memo file –memosep…
dbench – Measure disk throughput for simulated netbench run Synopsisdbench [options]numclients tbench [options]numclientsserver tbench_srv [options] DescriptionThis manual page documents briefly the dbench and tbench benchmarks. This manual page was written for the Debian GNU/Linux distribution because the original program does not have a manual page. However, it has fairly easy to read source code. Netbench…
dbcolstatscores – compute z-scores or t-scores for each value in a population Synopsisdbcolstatscores [-t] [–tmean=MEAN] [–tstddev=STDDEV] column DescriptionCompute statistics (z-score and optionally t-score) over a COLUMN of numbers. Creates new columns called “zscore”, “tscore”. T-scores are only computed if requested with the "-t" option, or if "–tmean" or "–tstddev" are explicitly specified (defaults are mean…
dbcolstats – compute statistics on a fsdb column Synopsisdbcolstats [-amS] [-c ConfidenceFraction] [-q NumberOfQuantiles] column DescriptionCompute statistics over a COLUMN of data. Records containing non-numeric data are considered null do not contribute to the stats (with the "-a" option they are treated as zeros). Confidence intervals are a t-test (+/- (t_{a/2})*s/sqrt(n)) and assume the population…
dbcolsregression – compute linear regression between two columns Synopsis dbcolsregression [-a] column1 column2DescriptionCompute linear regression over "column1" and "column2". Outputs slope, intercept, and correlation coefficient. Options-a or –include-non-numeric Compute stats over all records (treat non-numeric records as zero rather than just ignoring them). -f FORMAT or –format FORMAT Specify a printf(3)-style format for output statistics….
dbcolsplittorows – split an existing column into multiple new rows Synopsisdbcolsplittorows [-C ElementSeperator] [-e null] [-E] [-N enumerated-name] column [column…] DescriptionSplit column into pieces, outputting one row for each piece. By default, any empty fields are ignored. If an empty field value is given with -e, then they produce output. When a null value is…
dbcolsplittocols – split an existing column into multiple new columns Synopsisdbcolsplittocols [-E] [-C ElementSeparator] column [column…] DescriptionCreate new columns by splitting an existing column. The fragments of the column are each divided by ElementSeparator (default is underscore). This command is the opposite of dbcolmerge. Names of the new columns are given by splitting the name…
dbcolscorrelate – find the coefficient of correlation over columns Synopsis dbcolscorrelate column1 column2 [column3…]DescriptionCompute the coefficient of correlation over two (or more) columns. The output is one line of correlations. With exactly two columns, a new column correlation is created. With more than two columns, correlations are computed for each pairwise combination of rows, and…
dbcolrename – change the names of columns in a fsdb schema Synopsisdbcolrename OldName1 NewName1 [OldName2 NewName2] … DescriptionDbcolrename changes the names of columns in a fsdb schema, mapping OldName1 to NewName1, and so on for multiple pairs of column names. Note that it is valid to do “overlapping” renames like "dbcolrename a b b a"….