bash commands collection

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# This command find files with name has `news20` in the current directory and all of its sub-directories.
find . -name '*news20*'
# This command find and delete files with name has `news20` in the current directory and all of its sub-directories.
find . -name '*news20*' -delete

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ls -l --block-size=M

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# show the disk usage of each directories under the path [dir]
du -h --max-depth=1 [dir]

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# delete all jobs on sever
qselect -u <username> | xargs qdel
qstat -u <username> | wc -l