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echo $- If shell is interactive variable will contain i. | echo $- If shell is interactive variable will contain i. | ||
==explanation== | ==explanation== | ||
operand | operand 3, 3 + 6 = 9 '+' is the operator and '3' and '6' are the operands. | ||
operator | operator +, 3 + 6 = 9 '+' is the operator and '3' and '6' are the operands. | ||
primary | primary That which stands first in order, rank, or importance | ||
Arithmetic most elementary branch of mathematics, | Arithmetic most elementary branch of mathematics, | ||
Command control Testing exit status of a command in order to determine whether a portion of the program should be executed. | |||
Conditional branch Logical point in the program when a condition determines what happens next. | |||
Logic flow The overall design of the program. Determines logical sequence of tasks so that the result is successful and controlled. | |||
Loop Part of the program that is performed zero or more times. | |||
User input Information provided by an external source while the program is running, can be stored and recalled when needed. |
Revision as of 18:53, 24 January 2008
bash Shell
For using multiple filenames in one command in Unix commandline use the following command:
for i in <equal part of all filenames>*;do <command> $i;done
$1 is the variable set by the loop.
Example:
for i in sync_m4606_danube_sg_org_*;do /usr/atria/etc/mkorder -data $i -fship blrsxa16.blr.infineon.com;done
More examples:
for i in `ct lsvob |grep systemq | cut -d" " -f4`;do /usr/atria/etc/utils/albd_list -s $i;done
All Files starting with sync_m4606_danube_sg_org_ are used to perform a mkorder -data to forward these packets to Bangalore server.
for i in `cut -f2 -d" " viewlist.del`;do rm -r /home/memhub.view/$i;done
Use viewtags of column 2 of the file viewlist.del to remove the viewstorage.
Alternative
Use xargs for simply passing over results to a simple command:
ps- elf | grep <string> |tr -s " " |cut f<row nr.> -d" "|xargs <command>
tr - text replace with -s for substitute
e.g.:
ps -elf | grep CCMS | tr -s " " | cut -f5 -d" " |xargs kill
loop number
i=0; while [ $i -lt 10 ]; do echo $i; i=`expr $i + 1`; done
interactive shell
echo $- If shell is interactive variable will contain i.
explanation
operand 3, 3 + 6 = 9 '+' is the operator and '3' and '6' are the operands. operator +, 3 + 6 = 9 '+' is the operator and '3' and '6' are the operands. primary That which stands first in order, rank, or importance Arithmetic most elementary branch of mathematics, Command control Testing exit status of a command in order to determine whether a portion of the program should be executed. Conditional branch Logical point in the program when a condition determines what happens next. Logic flow The overall design of the program. Determines logical sequence of tasks so that the result is successful and controlled. Loop Part of the program that is performed zero or more times. User input Information provided by an external source while the program is running, can be stored and recalled when needed.