In the following note i will show how to print columns by numbers – first, second, last, multiple columns etc. I will show how to change the default field separator inawk. At the end of this article i will also show how to print or exclude specific columns or even ranges of columns ...
Use Awk to Print Columns from File To print entire columns from a file, we can employ a similar approach by specifying the desired fields in the “print” statement. However, this time we consider multiple lines to collectively represent the column. For example, to print the second and third...
This is probably one of the most common use cases for AWK: extracting some columns of the data file. awk '{ print $1, $3}' FS=, OFS=, file CREDITS,USER 99,sylvain 52,sonia 52,sonia 25,sonia 10,sylvain 8,öle , , , 17,abhishek Here, I explicitly set both the input and outp...
This is an introductory tutorial to comparison operators inAwk, therefore you need to try out many other options and discover more. For those seeking a comprehensive resource, we’ve compiled all theAwkseries articles into a book, that includes 13 chapters and spans 41 pages, covering both basi...
可以将文本结果转换为整齐的表格,上下对齐命令:Column使用的参数:-t :表格,默认以空格间隔-s:需要配合-t使用,指定分隔符 监控ogg命名字段对齐 [oracle@db ogg]$ (echo info all;echo exit)|./ggsci|grep -E "EXTRACT|REPLICAT" |awk 'BEGIN {FS=" +"} {print $3,$2,$ ...
Linux/shell: Concatenate multiple lines to one line $ cat file START Unix Linux START Solaris Aix SCO 1. Join the lines following the pattern START without any delimiter. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. $ awk '/START/{if (NR!=1)print "";next}{printf $0}END{print "";}...
apt-get install linux-headers-`uname -r` build-essential 删除时报错 can't remove Device or resource busy 删除时报错 can't remove XXX Device or resource busy 使用如下命令 lsof +D ./XXX | awk '{print $2}' | tail -n +2 | xargs -r kill -9 然后再 rm...
awk -v days="-8" 'BEGIN{print strftime("%Y-%m-%d",systime()+(days*86400))}' Arrays in Awk Awk’s support of associative arrays, combined with its ability to treat individual columns as fields, provides a very powerful mechanism for analysing and processing data. This allows for running...
sudolvdisplay|awk'/LV Name/{n=$3} /Block device/{d=$3; sub(".*:","dm-",d); print d,n;}' 二、查看主机所有lvs dmsetupinfo 三、对比dm设备和lsblk(MAJ:MIN)对应关系 lsblk 或 lsblk-f 四、例:dm-1、dm-2设备映射关系 1.dm-*映射成具体的逻辑卷 ...
Print only specific field from a file. $ awk '{print $2,$5;}' employee.txt More awk examples: 8 Powerful Awk Built-in Variables – FS, OFS, RS, ORS, NR, NF, FILENAME, FNR 7. vim command examples Go to the 143rd line of file $ vim +143 filename.txt Go to the first match...