Commands by ctcrnitv

Commands by ctcrnitv (7)

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encode video with constant framerate
This is sample output - yours may be different.
0

ffmpeg -i input.mp4 -vcodec libx264 -crf 30 output.mp4

ctcrnitv · 2018-08-13 23:29:50 384
security find-generic-password -ga "ROUTERNAME" | grep "password:"
This is sample output - yours may be different.
0

access wifi password through terminal (osx)

ctcrnitv · 2018-03-12 06:40:38 25
Remove all node_module folders recursively

makes sure not to skip children nodemodules credit: https://coderwall.com/p/guqrca/remove-all-node_module-folders-recursively
This is sample output - yours may be different.
0

find . -name "node_modules" -type d -prune -exec rm -rf '{}' +

ctcrnitv · 2018-02-10 04:23:36 22
Sync copy directories except (OSX)
This is sample output - yours may be different.
0

rsync -rP --exclude=x source/ target/

ctcrnitv · 2017-08-03 22:08:01 17
check for hanging postgres process (postmaster.pid)

to kill, use `kill PID` Credit: user Craig Ringer on stackexchange.com, recommends to kill the process rather than deleting postmaster.pid when there is an orphan Postgresql server process. Show Sample Output
This is sample output - yours may be different.
```
42356
/usr/local/var/postgres
1485996870
5432
/tmp
localhost
  5432001    131072
```
0

cat /usr/local/var/postgres/postmaster.pid

ctcrnitv · 2017-02-07 02:38:28 19
Recursively delete all files of a specific extension

simulation test to see which files would be deleted: find . -name "*.bak" -type f
This is sample output - yours may be different.
0

find . -name "*.bak" -type f -delete

ctcrnitv · 2017-01-29 00:06:47 18
Recursively unzip archives to their respective folder
This is sample output - yours may be different.
0

find . -name "*.zip" | while read filename; do unzip -o -d "`dirname "$filename"`" "$filename"; done;

ctcrnitv · 2017-01-28 23:58:35 22

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sort lines by length

making it "sound" more "natural" language like -- additionally sorting the longest words alphabetically: this approach is using: * to get at all lines of input * post-"for" structure * short-circuit-or in sort: if the lengths are the same, then sort alphabetically otherwise don't even evaluate the right hand side of the or * -C sets all input and ouput channels to utf8

Which processes are listening on a specific port (e.g. port 80)

swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

cd into another dir to run a one-liner, but implicitly drop back to your $OLD_PWD after

Obviously the example given is necessarily simple, but this command not only saves time on the command line (saves you using "cd -" or, worse, having to type a fully qualified path if your command cd's more than once), but is vital in scripts, where I've found the behaviour of "cd -" to be a little broken at times.

Create a local compressed tarball from remote host directory

The command uses ssh(1) to get to a remote host, uses tar(1) to archive a remote directory, prints the result to STDOUT, which is piped to gzip(1) to compress to a local file. In other words, we are archiving and compressing a remote directory to our local box.

Tar files matching a certain wildcard

This is a shortcut to tar up all files matching a wildcard. Tar doesn't have the --include (apparently).

how to export a table in .csv file

Exports the result of query in a csv file

list block devices

Shows all block devices in a tree with descruptions of what they are.

Adding specific CustomLog for each Virtual Domain of Apache

Count opening and closing braces in a string.

This function counts the opening and closing braces in a string. This is useful if you have eg long boolean expressions with many braces and you simply want to check if you didn't forget to close one.

history autocompletion with arrow keys

This will enable the possibility to navigate in the history of the command you type with the arrow keys, example "na" and the arrow will give all command starting by na in the history.You can add these lines to your .bashrc (without &&) to use that in your default terminal.

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