I have a text file with layout as:
tableName1|counterVariable1
tableName2|counterVariable2
I want to replace the counterVariable1 with some other variable say counterVariableNew.
How can I accomplish this?
I have tried various SED/AWK approaches, closest one is mentioned below:
cat $fileName | grep -w $tableName | sed -i 's/$tableName\|counterVariable/$tableName\|counterVariableNew'
But all the 3 commands are not merging properly, please help!
Your script is an example of [ useless use of cat ] . But the key point here is to escape the pipe delimiter which has a special meaning(it stands for OR) when used with awk FS
. So below script should do
# cat 42000479
tableName1|counterVariable1
tableName2|counterVariable2
tableName3|counterVariable2
# awk -F\| '$1=="tableName2"{$2="counterVariableNew"}1' 42000479
tableName1|counterVariable1
tableName2 counterVariableNew
tableName3|counterVariable2
An alternate way of doing the same stuff is below
# awk -v FS='|' '$1=="tableName2"{$2="counterVariableNew"}1' 42000479
Stuff inside the single quote will not be expanded.
awk -F'|' -v OFS='|' '/tableName1/ {$2="counterVariableNew"}1' file
tableName1|counterVariableNew
tableName2|counterVariable2
This will search for A (tableName1)
and replace B (counterVariable1)
to counterVariableNew
.
Or by using sed
:
sed -r '/tableName1/ s/(^.*\|)(.*)/\1counterVariableNew/g' file
tableName1|counterVariableNew
tableName2|counterVariable2
For word bounded search: Enclose the pattern inside \\<
and \\>
.
sed -r '/\<tableName1\>/ s/(^.*\|)(.*)/\1counterVariableNew/g' file
awk -F'|' -v OFS='|' '/\<tableName1\>/ {$2="counterVariableNew"}1' file
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