I have a file which is like this
user:[dgalanos] rid:[0xa35]
user:[roleary] rid:[0xa36]
user:[smorgan] rid:[0xa37]
How can i print only the usernames like this
dgalanos
roleary
smorgan
I tried
cat users.txt | awk -F ':' '{print $2 > "users3.out"}'
But it did not give me the correct result i expected.
The most simple way is to modify your command as follows:
awk -F '[' '{print $2}' users.txt | awk -F ']' '{print $1}' > users3.out
awk to catch at first what is after the [ and then what is after the ]. The delimiter are you interested in is not the semiclon, but the brackets.| means that the output of the first command is used as input of the second command. The second awk does not work if you use it alone, but it gets some sense only if you pipe it to the first command.awk there is no repetition of the input file users.txt. If you are curious to use the second awk alone, write: awk -F ']' '{print $1}' users.txtcat output to awk because awk can accept files as inputawk command, but at the end of the full command.If you want to see the results in the terminal but not in a file, you can remove the part from >
There is a more elegant way to get the data without piping two awk commands but defining the two brackets as delimiters:
awk -F '[][]' '{print $2}' users.txt > users3.out
