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Last Updated: September 30, 2026
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media.ccc.de/v/ASG2019-121-squeezing-water-from-stone- Learn about different types of shells in Unix and Linux, including the Bourne Shell, C Shell, by Siteshwar Vashisht At: FOSDEM 2019 video.fosdem.org/2019/H.2215/ Gives a real example of using a text file for input to a You can use default values instead of command line values. Var1="${1:-$Var2} In the above, if a person entered a command line ... Sometimes, you want a command line flag to take an argument as in "cal -m may". To do this, put a ":" after the flag in the getopts ... Discover details at: masteringunixshell.net/qa51/bash-vs- Anytime a discussion about what VarName=$(Function). The previous line will save all output going to the terminal screen to the variable VarName. Goes over how to store aliases, functions, and code in a file, and access them from another Goes over how to use a text file as your input. This removes the need of you typing in data on the command line when a program ... Using a while loop w/ the getopts to read any number of command line flags. while getopts :xy Flag do commands done.
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