Linux instructions: Linux Command output headers, overlay two commands to obtain the headers and content, linux2

Linux instructions: Linux Command output headers, overlay two commands to obtain the headers and content, linux2
Linux Command output Header

When using Linux commands, if there is a pipeline "|" in the command, the header (title) information is lost in the output information. It is inconvenient to see what each column means.

$ ps axuwUSER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMANDroot         1  0.0  0.2  37888  5952 ?        Ss   01:21   0:02 /sbin/init nopromptroot         2  0.0  0.0      0     0 ?        S    01:21   0:00 [kthreadd]root         3  0.0  0.0      0     0 ?        S    01:21   0:00 [ksoftirqd/0]root         5  0.0  0.0      0     0 ?        S<   01:21   0:00 [kworker/0:0H]

After adding the Pipeline character

$ ps axuw | grep javafaster    8502  0.0  0.0  12948   972 pts/1    S+   02:15   0:00 grep java

Simple Method: overlay two commands to obtain the header and content

First, add "| head-1" to the Command itself to get the header (title), and then use the command to output the content. overlay the two to get the desired result.

$ ps axuw | head -1;ps axuw | grep javaUSER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMANDfaster    8510  0.0  0.0  12948   940 pts/1    S+   02:17   0:00 grep java

Sort output results

Method 1: | Sort-rn-k column no.

root@ubuntu:/home/faster/Fastdfs/FastDFS# ps auxw | sort -rn -k6root       851  0.2  1.6 408816 33224 ?        Ssl  01:21   0:10 /usr/bin/docker daemon -H fd://root       868  0.0  0.6 213068 13320 ?        Ssl  01:21   0:02 containerd -l /var/run/docker/libcontainerd/docker-containerd.sock --runtime runc --start-timeout 2mroot      8452  0.0  0.3  95584  7212 ?        Ss   01:47   0:00 sshd: tiger [priv]root       980  0.0  0.3  95464  7088 ?        Ss   01:21   0:00 sshd: tiger [priv]root      1044  0.0  0.3  95464  7048 ?        Ss   01:23   0:00 sshd: tiger [priv]root       854  0.0  0.3  65612  6616 ?        Ss   01:21   0:00 /usr/sbin/sshd -Droot       592  0.0  0.3 274592  6240 ?        Ssl  01:21   0:00 /usr/lib/accountsservice/accou

In this example, 6th columns are sorted, before the maximum number of rows.

Method 2:-Sort =-column name

ps auxw --sort=-rss

If you only want to view the first 10 items:

ps auxw | sort -rn -k6 | head -10

Application 1: display the top 10 processes with the maximum memory consumption

Ps auxw | head-1; ps auxw | sort-rn-k6 | head-10 or ps auxw -- sort =-rss | head-10