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Most usage is centered around a dozen or so commands:
| ls, more, less, cat, nano, pwd, cd, man, bsub, bkill, bjobs, ps, scp, ssh, cp, chmod, rm, mkdir, passwd, history, zip, unzip, tar, df, du, head, tail, grep |
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See the man pages for complete documentation. Here is a short description of some.
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What text editors are available?
| nano, nedit, vi, vim, emacs |
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How do I strip out ^M embedded characters in my files I transferred from my PC?
Use the dos2unix command on the file. There is man page documentation available for further info. Also check this page for additional tips.
> man dos2unix
What is a man page?
man pages are linux/unix style text based documentation. For example, to obtain documentation on the command cat:
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Issue the following in the directory of interest:
| > find . -name "A-Z" | cut -c 3- - | awk '{print $1,tolower($1)}' | xargs -i echo "mv {}" | csh |
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This will find everything with uppercase letters and rename it to the
same thing with all lowercase.
How do I uncompress and extract many .gz and corresponding tar files?
| > ls -1 *.gz | xargs -n 1 -r -I {} tar zxf {} |
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Sometimes I get a cryptic message about too many open files, what is that?
There are several resource settings associated with a default account. To see the settings:
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It is best not to ssh into the cluster while you are on the login node of the cluster.
I compiled a program locally in my account and I would like to add the location of the executables to my PATH, how do I do this?
Suppose your software directory is located in you home directory and your username is jdoe02. Your software directory is flight_program/ and there is a bin subdirectory located within containing executables.
$PATH is a global environmental variable defined for the cluster for general access to important locations. You may add to it by pre-pending the path you wish to be searched.
PATH=/cluster/home/j/d/jdoe02/flight_program/bin:$PATH export PATH |
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To see if it got updated:
| > printenv | grep PATH |
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