bash
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set options
set options -xeuo
Commonly used options:
-x
: turns on debug output, logging each command as it is executed-e
: causes the script to exit on most command failures (non-zero exit codes)-u
: treats unset variables and parameters other than the special parameters @ or * as an error when performing parameter expansion-o
pipefail: causes the script to exit if a command in a pipeline fails- use a + to unset them if necessary
Many more options available: https://www.gnu.org/software/bash/manual/html_node/The-Set-Builtin.html
Variables
$@
- All of the arguments as individual strings“$*”
- All of the arguments as a single string$#
- The number of arguments$1..n
- Where n is an integer, the nth argument in the list$0
- The command name$?
- The last exit code$IFS
- Internal/input field separator (defaults to combo of space, newline and tab)
bash.1597252772.txt.gz · Last modified: 2020/08/12 17:19 by shawn