. You can use the || operator to execute a command and, if it fails, execute the next command in the command list. For example: cmd1 || cmd2 . cmd1 is executed and its exit status examined. If cmd1 fails then cmd2 is executed. This is a terse notation for: cmd1 if test $? -ne 0 then cmd2 fi . Example .

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• Example of using the operator
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... Apache HTTP Server Version 2.2 . ... htpasswd is used to create and update the flat-files used to store usernames and password for basic authentication of HTTP users. ... Resources available from the Apache HTTP server can be restricted to just the users listed in the files created by htpasswd . ... Files managed by htpasswd may contain both types of passwords; some user records may have MD5-encrypted passwords while others in the same file may have passwords encrypted with crypt() . ... Delete user...

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STSCI Python Introduction Class 3 Jim Hare Today's Agenda · · · · · · Functions Passing Arguments to Modules File I/O User Defined Objects Variable Scopes System Commands and Controls 1 Functions · Function template · Consists of def statement, parameters and return def test1(x,y,j=`testcase1') j=`testcase1' is the default · Example update_default_db.py isql' % (account,database)) os.system('printf "select db_name()\\ngo" | ...

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• SMOV Status Planning Meeting Minutes 02/23/97
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• Programming Languages

... fork() . ... A process is basically a single running program. ... System is prototyped in <stdlib.h> . ... Each command and sorresponding arguments are put in a args array */ /* execvp is called to execute these commands in child process */ /* spawned by fork () */ /* cc -o fork fork .c */ #include stdio.h #include sys/types.h #include unistd.h main() { char buf [1024]; char * args [64]; for (;;) { /* * Prompt for and read a command. */ printf( Command: ); if (gets( ...

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... Apache HTTP Server Version 2.4 . Apache > HTTP Server > Documentation > Version 2.4 > Modules . ... Description: . ... This module is designed for the use in test suites and large networks which have to deal with different httpd versions and different configurations. ... IfVersion [[!] operator ] version > .. ... httpd version is equal . ... Questions on how to manage the Apache HTTP Server should be directed at either our IRC channel, #httpd, on Freenode, or sent to our mailing lists . ...

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AO19 Cal Controller - Commands Document No. RCV001, Rev. 001 AO19 Cal Controller - Commands Luis Quintero, Arecib o Observatory 1 Intro duction Example: >> << >> << >> << CAL? calm0000000 CALS01 calok CAL? calm1000000 All the commands must start with the same initials (CAL - case sensitive) and followed by the command letter, and options, if required. The examples below show commands from the computer to the device >>, and the device response <<. ...

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multi-rsh is a perl script which runs the same command on multiple machines, in parallel, and provides reasonable, adjustable timeouts for those machines which fail to answer. Both standard output and standard error are returned through the same channel, and all output has the hostname prepended to each line. Multi-rsh must be run as root (remote jobs can be set to run as any user, see Options below). ... Neither form allows you to directly pass input to the remote programs. ...

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... You are here: start €Ё lbaops €Ё expres €Ё commandset . ... VLBI Schedule . ... Observer's Wiki . ... lbaops:expres:commandset . ... play_rate=data:<rate> . ... During eVLBI the JIVE correlator control software issues the following commands from the Mark5A command set to the Mark5 at the station: . ... Used to set the output data rate of the Mark5 at the station. ... Used to make the Mark5 stop playing if it was playing back data from disk. ... Used to make the Mark5 at the station start sending...

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... Both users and system administrators often need to run commands periodically. For example, the system administrator might want to run a command to clean the directories with temporary files ( /tmp љ and /var/tmp љ ) from old files, to keep the disks from filling up, since not all programs clean up after themselves correctly. The cron љ service is set up to do this. Each user has a crontab љ , where he lists the commands he wants to execute and the times they should be executed. ...

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... The mirrorCtrl mirror controller actor controls one telescope mirror. It accepts desired orientation and commands mirror motion accordingly. ... It is presently designed to command a Galil mirror controller , but one may add support for other low-level motion controllers. mirrorCtrl is written pure Python. ... Home the desired actuators, where actuator list is a comma-separated list of actuator letters A through F (but some mirrors have fewer than 6 actuators). 2.5m M1 valid actuators: A-F . ...

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... omgchain (omgchain-1.6) [xmmsas_20070708_1801-7.1.0] . ... Use command `omgchain` to process the ODF data set in the current directory or to where SAS_ODF has been set to, and to place the product files in the current directory. Use command `omgchain outdirectory=output_directory_path` to process the ODF data set in the current directory or to where SAS_ODF has been set to, and to place the output files into the specified directory. ...

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• Example 2: Correcting for bad pixels
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This module illustrates many of the aspects of the Apache 1.2 API and, when used, demonstrates the manner in which module callbacks are triggered by the server. ... Source File: mod_example.c . ... The files in the src/modules/example directory under the Apache distribution directory tree are provided as an example to those that wish to write modules that use the Apache API. ... Example . ... Uncomment the "AddModule modules/example/mod_example" line near the bottom of the src/Configuration file. ...

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The study of energetic particles acceleration and transport within the magnetosphere and on its boundaries is the main goal of DOK-2 experiment on Auroral Probe in a frame of INTERBALL project. ... DOK-2 uses two pairs of energetic particle telescopes . ... This information is available only during the most informative Real Time mode of DOK-2. ... Full 56-57 channel spectra accumulated during time intervals from 10 s to 1464 s depending on a particle intensity. ... For this time interval: . ...

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... how to ingest general calibration products . ... enabled for ingestion of master calibs produced with phoenix 2.0 (transparent for normal operations) . ... log files list_ingest and list_qc1update in $DFO_LST_DIR . ... T he tool is enabled to ingest IDPs (internal data products, being science products generated by QC through the phoenix process). ... It must be checked that files have been successfully ingested. ingestProducts -m CALIB -d 2004-10-12 ingest master calibrations for that date . ...

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... This command specifies the default delay to be used under these circumstances. ... This command configures a trap receiver at the given host address and port number for sending messages with the specified local interface address. ... While such monitor programs may also request their own trap dynamically, configuring a trap receiver will ensure that no messages are lost when the server is started. setvar variable [ default ] . This command adds an additional system variable. ...

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... Stellar Evolution . Nucleosynthesis in Stars . The Evolution of Star Clusters . JAVA Physics Lab . Alternative Energies Class . Steve Kevan's Physics 251 Class . ... Talk on Solid State Physics of CCD detectors . Talk on Cosmological Issues . ... Digital Spectra of Stars . NETexperts E-mail List . The Electronic Universe Project e-mail: nuts@moo.uoregon.edu ...

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Winer Observatory P.O. Box 797, Sonoita, Arizona 85637-0797, USA . ... 2/3-m Telescope . ... Site . ... Commanding . ... In a typical robotic observing scenario, each afternoon, a telescope control computer obtains a set of objects to observe from its home institution from a command or script file. ... The file is then transferred to the telescope control computer at the Winer Observatory in Sonoita. ... The Iowa control computer then begins processing the telrun.sls file. ... 2013 Winer Observatory. ...

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... Bojan Nikolic web pages (r. 329) . ... Since version 0.12, libAIR comes with a simple command line interface to the routines which retrieve the water vapour and the phase correction coefficient. Currently only the very simplest model is supported, in which the all of pressure, temperature and water vapour column are free parameters, and they are inferred from the four observed water vapour radiometer readings. ... Command line interface to libAIR and water vapour column retrieval . ...

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• Introduction to SCons Bojan Nikolic web pages (r. 329)

The idea of component-oriented programming is that in the course of implementation of various software projects a programmer (or a programmers team) accumulates a library of reused software fragments that are used in different projects. ... To solve such problems there are some special syntax means in Actor Prolog that support component-oriented programming. ... A package in Actor Prolog is a set of classes linked by implication. ... Actor Prolog supports visual component-oriented programming. ...

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... Previous: The Importance of Mid-Range Telescope Data Archives - an Example of Ondejov Observatory 2-meter Telescope . ... We developed a data archive system STARS (Subaru Telescope Archive System) for handling, storing, managing and serving these data, and current stored number of data files is about 50,000. ... All of them are stored and managed in STARS (Subaru Telescope ARchive System) which was developed in the super-computer system in Hilo base facility of Subaru telescope (Takata et al. ...

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