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string_operations

108 Treffer, Zuletzt geändert: vor 17 Jahren

ate the minus sign and the colon with a space. <code>${string:position} </code> Extracts substring from $string at $position. ... onal parameters, [1] starting at $position. <code>${string:position:length}</code> Extracts $length characters of substring from ... nal parameters, starting at second. </code> <code>expr substr $string $position $length </code> Extracts $length characters from $string start... name, without the leading dashes. Returns with code zero if the string is a long option without argument, else returns with code one. An option must be of the form --option, onl

test

47 Treffer, Zuletzt geändert: vor 16 Jahren

nteger comparison ==== ---- -eq is equal to <code> if [ "$a" -eq "$b" ]</code> ---- -ne is not equal to <code> if [ "$a" -ne "$b" ]</code> ---- -gt is greater than <code> if [ "$a" -gt "$b" ]</code> ---- -ge is greater than or equal to <code>if [ "$a" -ge "$b" ]</code> ---- -lt is less than <code>if [ "$a" -lt "$b" ]</

monitor

2 Treffer, Zuletzt geändert: vor 17 Jahren

== Directory/File Monitoring with Bash ====== <code> #!/bin/bash # File Monitor # function list () { #ls -l #sleep 1 # more elegant: watch -n 1 "ls -l" } while true; do list | grep $1 done </code>