awk的替換字符串中出現的所有全球

Question

我有替換字符串在另一個文件中bash腳本：

... 
# make MC input script 
sig=2.6 
awk -v sig="$sig" '{ 
     sub(/XSIGX/, sig); 
     print; 

}' input.txt > output.txt 

當我input.txt運行此我得到以下爲output.txt（通知替換爲「2.6」，但在其在cat線缺乏）：

... 
echo "hi" >> /work/d/dfranz/o2_modeling/simulated_densities_2.6.txt 

cat /work/d/dfranz/o2_modeling/simulated_densities_2.6.txt | sort -nk1 > /work/d/dfranz/o2_modeling/simulated_rho_sorted_XSIGX.txt # <--- This XSIGX was not replaced but the first occurrence in this line was 
rm /work/d/dfranz/o2_modeling/simulated_densities_2.6.txt 

Answer 1

在AWK功能sub替代了一個/第一個實例。如果用gsub替換sub應替換所有實例。因此，這應該工作正常：

sig=2.6 
awk -v sig="$sig" '{ 
     gsub(/XSIGX/, sig); 
     print; 

}' input.txt > output.txt