我需要帮助，我正在尝试更改bar（/）所有行中的前两个逗号（，）。在shell脚本中

这应该可以解决问题：

# Assuming input is inputfile
# First replace the first comma with forward-slash (bar) ad save
sed 's/,/\//1' inputfile > temp
# Now take the temporary file and do the same (which replaces the 2nd comma)
sed 's/,/\//1' temp > outputfile

#print the result
cat outputfile

示例运行：

mamuns-mac:~ xmrashid$ cat inputfile
a,b,c,d,e
b,d,e,f
mamuns-mac:~ xmrashid$ ./do.sh
a/b/c,d,e
b/d/e,f
mamuns-mac:~ xmrashid$