Bash
bash competion otpions : http://caliban.org/bash/Manipulation sur les dates
- date '+%d-%m-%Y' --date '1 days ago' -> HIER
- date '+%d-%m-%Y' --date '1 days' -> DEMAIN
Faire un traitement sur toutes les d'un fichier
#! /bin/bash
while read line
do
echo -e "$line\n"
done < file.txt
Faire un switch/case en bash
case $ACTION in
CREATE) echo create $FILE;;
DELETE) echo delete $FILE;;
*) echo ignored ;;
esac
String manipulation
http://tldp.org/LDP/abs/html/string-manipulation.html bash competion otpions : http://caliban.org/bash/
Manipulation sur les dates
- date '+%d-%m-%Y' --date '1 days ago' -> HIER
- date '+%d-%m-%Y' --date '1 days' -> DEMAIN
Faire un traitement sur toutes les d'un fichier
#! /bin/bash
while read line
do
echo -e "$line\n"
done < file.txt
Faire un switch/case en bash
case $ACTION in
CREATE) echo create $FILE;;
DELETE) echo delete $FILE;;
*) echo ignored ;;
esac
String manipulation
http://tldp.org/LDP/abs/html/string-manipulation.html
Lenght
${#string}
example:
stringZ=abcABC123ABCabc
echo ${#stringZ} # 15
Substring Replacement
${string/substring/replacement}
Replace first match of $substring with $replacement. [2]
${string//substring/replacement}
Replace all matches of $substring with $replacement.
stringZ=abcABC123ABCabc
echo ${stringZ/abc/xyz} # xyzABC123ABCabc
# Replaces first match of 'abc' with 'xyz'.
echo ${stringZ//abc/xyz} # xyzABC123ABCxyz
# Replaces all matches of 'abc' with # 'xyz'.
echo ---------------
echo "$stringZ" # abcABC123ABCabc
echo ---------------
# The string itself is not altered!
# Can the match and replacement strings be parameterized?
match=abc
repl=000
echo ${stringZ/$match/$repl} # 000ABC123ABCabc
# ^ ^ ^^^
echo ${stringZ//$match/$repl} # 000ABC123ABC000
# Yes! ^ ^ ^^^ ^^^
echo
# What happens if no $replacement string is supplied?
echo ${stringZ/abc} # ABC123ABCabc?
echo ${stringZ//abc} # ABC123ABC?
# A simple deletion takes place.
${string/#substring/replacement}
If $substring matches front end of $string, substitute $replacement for $substring.
${string/%substring/replacement}
If $substring matches back end of $string, substitute $replacement for $substring.
stringZ=abcABC123ABCabc
echo ${stringZ/#abc/XYZ} # XYZABC123ABCabc?
# Replaces front-end match of 'abc' with 'XYZ'.
echo ${stringZ/%abc/XYZ} # abcABC123ABCXYZ
# Replaces back-end match of 'abc' with 'XYZ'.
Lenght
${#string}
example:
stringZ=abcABC123ABCabc
echo ${#stringZ} # 15
Substring Replacement
${string/substring/replacement}
Replace first match of $substring with $replacement. [2]
${string//substring/replacement}
Replace all matches of $substring with $replacement.
stringZ=abcABC123ABCabc
echo ${stringZ/abc/xyz} # xyzABC123ABCabc
# Replaces first match of 'abc' with 'xyz'.
echo ${stringZ//abc/xyz} # xyzABC123ABCxyz
# Replaces all matches of 'abc' with # 'xyz'.
echo ---------------
echo "$stringZ" # abcABC123ABCabc
echo ---------------
# The string itself is not altered!
# Can the match and replacement strings be parameterized?
match=abc
repl=000
echo ${stringZ/$match/$repl} # 000ABC123ABCabc
# ^ ^ ^^^
echo ${stringZ//$match/$repl} # 000ABC123ABC000
# Yes! ^ ^ ^^^ ^^^
echo
# What happens if no $replacement string is supplied?
echo ${stringZ/abc} # ABC123ABCabc?
echo ${stringZ//abc} # ABC123ABC?
# A simple deletion takes place.
${string/#substring/replacement}
If $substring matches front end of $string, substitute $replacement for $substring.
${string/%substring/replacement}
If $substring matches back end of $string, substitute $replacement for $substring.
stringZ=abcABC123ABCabc
echo ${stringZ/#abc/XYZ} # XYZABC123ABCabc?
# Replaces front-end match of 'abc' with 'XYZ'.
echo ${stringZ/%abc/XYZ} # abcABC123ABCXYZ
# Replaces back-end match of 'abc' with 'XYZ'.