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- linux - How does cat lt; lt; EOF work in bash? - Stack Overflow
The cat <<EOF syntax is very useful when working with multi-line text in Bash, eg when assigning multi-line string to a shell variable, file or a pipe Examples of cat <<EOF syntax usage in Bash: 1 Assign multi-line string to a shell variable $ sql=$(cat <<EOF SELECT foo, bar FROM db WHERE foo='baz' EOF )
- linux - How can I copy the output of a command directly into my . . .
cat file | xclip Paste the text you just copied into a X application: xclip -o To paste somewhere else other than an X application, such as a text area of a web page in a browser window, use: cat file | xclip -selection clipboard Consider creating an alias: alias "c=xclip" alias "v=xclip -o"
- No such file or directory but it exists - Stack Overflow
$ cat deluge-gtk lock cat: deluge-gtk lock: No such file or directory $ file deluge-gtk lock deluge-gtk
- linux - Retrieve last 100 lines logs - Stack Overflow
You can simply use the following command:-tail -NUMBER_OF_LINES FILE_NAME e g tail -100 test log will fetch the last 100 lines from test log
- How does an SSL certificate chain bundle work? - Stack Overflow
Unix: cat cert2 pem cert1 pem root pem > cert2-chain pem Windows: copy A cert1 pem+cert1 pem+root pem cert2-chain pem A 2 2 Run this command openssl verify -CAfile cert2-chain pem cert3 pem 2 3 If this is OK, proceed to the next one (cert4 pem in this case) Thus for the first round through the commands would be
- How to append output to the end of a text file - Stack Overflow
printf "hello world" >> read txt cat read txt hello world However if you were to replace printf with echo in this example, echo would treat \n as a string, thus ignoring the intent printf "hello\nworld" >> read txt cat read txt hello world
- How to get . pem file from . key and . crt files? - Stack Overflow
cat otherfilegodaddygivesyou crt gd_bundle-g2-g1 crt > name crt Then I used these instructions from Trouble with Google Apps Custom Domain SSL , which were: openssl rsa -in privateKey key -text > private pem openssl x509 -inform PEM -in www_mydomain_com crt > public pem
- Windows batch - concatenate multiple text files into one
Windows type command works similarly to UNIX cat Example 1: Merge with file names (This will merge file1 csv file2 csv to create concat csv) type file1 csv file2 csv > concat csv Example 2: Merge files with pattern (This will merge all files with csv extension and create concat csv) When using asterisk(*) to concatenate all files
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