How to Append the Output to a File

How to append the output to a file?

Use >> to append:

command >> file

Need to append output to a file

Try something like this one,

- name: Add contents to a file and appends the data in file
  lineinfile:
    path: /root/testfile
    line: "{{ output.stdout }}"
    create: yes

This task adds the line i.e., output.stdout to the file and it always appends data to the file without overwriting the content.

The create special attribute is used to create the file if it is not present.

Configure it according to your use case. I have created the below sample,

- name: save output to config backup directory
  lineinfile:
    line: " {{ output.stdout[0] }}{{output.stdout[1] }}"
    path: "/home/hhh.ghydggxxxx.xx/paxxxx/playbook-xx/vlan351/port_output/{{inventory_hostname}}.txt"
    create: yes
  delegate_to: localhost

How to redirect and append both standard output and standard error to a file with Bash

cmd >>file.txt 2>&1

Bash executes the redirects from left to right as follows:

1. >>file.txt: Open file.txt in append mode and redirect stdout there.
2. 2>&1: Redirect stderr to "where stdout is currently going". In this case, that is a file opened in append mode. In other words, the &1 reuses the file descriptor which stdout currently uses.

How to append a file with the existing one using CURL?

Use the shell's appending output redirection (>>) rather than curl's --output option.

curl http://192.99.8.170:8098/stream >> test.pls

How to redirect and append using Bash shell?

See below:

ps -C httpd | grep httpd >> final.txt

Explanation:

ps -C httpd prints out the ps entry related to httpd command only in the form like:

  PID TTY         TIME CMD
14308 pts/0   00:00:00 httpd

so we have the entry what we need with headers (PID, TTY etc.).

To filter-out headers we pipe this output to grep httpd, which pushes to its out the lines containing string httpd only, like:

14308 pts/0   00:00:00 httpd

Finally, we redirect this output to file final.txt in append mode, using >> operator.

How to append a wget text file output to an exsisting file?

wget 'https://fiddle.jshell.net/robots.txt' -O - > text.txt
wget 'https://phpfiddle.org/robots.txt' -O - >> text.txt

Note the >> on the 2nd one for "append".

append the column in another text file

$ cat tst.awk
NR==FNR {
    for (numBlocks=1; numBlocks<=NF; numBlocks++) {
        vals[numBlocks,NR] = $numBlocks
    }
    next
}
/^>/ {
    blockNr++
    rowNr = 0
    print
    next
}
{ printf "%s %7s\n", $0, vals[blockNr,++rowNr] }

$ awk -f tst.awk file1 file2
> > > >
    10.0    8.5     2.0
    20.0    8.5     3.0
    30.0    8.5     4.0
    40.0    8.5     5.2
> > > >
    10.0    8.0    44.8
    20.0    8.0    58.4
    30.0    8.0    97.2
    40.0    8.0    35.3
> > > >
    10.0    9.0   789.3
    20.0    9.0   453.0
    30.0    9.0  -489.1
    40.0    9.0   458.6
> > > >

---

Related Topics