Commands by quincymd

Commands by quincymd (5)

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Selecting a random file/folder of a folder

random file from files in directory
This is sample output - yours may be different.
2

ls -1 | shuf -n 1

quincymd · 2011-03-13 22:14:57 6
Convert first letter of string to uppercase

Let bash do the work by converting the initial of a string to an uppercase Show Sample Output
This is sample output - yours may be different.
```
string="hello"
string="${string^}"
echo $string
Hello
```
0

string="${string^}"

quincymd · 2010-11-14 01:16:04 11
Isolate file name from full path/find output

Quick method of isolating filenames from a full path using expansion. Much quicker than using "basename" Show Sample Output
This is sample output - yours may be different.
```
where fullpath="./path/to/filename.txt"
echo ${fullpath##*/} returns "filename.txt"
```
9

echo ${fullpath##*/}

quincymd · 2010-07-21 22:35:29 11

Fewer keystrokes to search man page of command

Quicker way to search man pages of command for key word Show Sample Output

function mg(){ man ${1} | egrep ${2} | more; }

quincymd · 2010-07-01 21:14:24 9

Get a funny one-liner from www.onelinerz.net

Put this command in .bashrc and every time you open a new terminal a random quote will be downloaded and printed from onelinerz.net. By altering the URL in the w3m statement you can change the output: 1 to 10 lines - http://www.onelinerz.net/random-one-liners/(number)/ 20 newest lines - http://www.onelinerz.net/latest-one-liners/ Top 10 lines - http://www.onelinerz.net/top-100-funny-one-liners/ Top 10 lines are updated daily.
This is sample output - yours may be different.
1

w3m -dump_source http://www.onelinerz.net/random-one-liners/1/ | awk ' /.*<div id=\"oneliner_[0-9].*/ {while (! /\/div/ ) { gsub("\n", ""); getline; }; gsub (/<[^>][^>]*>/, "", $0); print $0}'

quincymd · 2010-06-02 21:15:37 7

What's this?

commandlinefu.com is the place to record those command-line gems that you return to again and again. That way others can gain from your CLI wisdom and you from theirs too. All commands can be commented on, discussed and voted up or down.

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Email yourself after a job is done

This is a two part command that comes in really handy if you're running commands that take longer than you're willing to wait. The commands are separated by the semicolon(;) The first command is whatever you're attempting to do. The second commands emails you after the job completes.

Uptime in minute

Want to run scripts/programs in the system after starting X minute [ For letting the system to free ]? This will give uptime in minute.

Kill any lingering ssh processes

Also ignoring "sshd" server is necessary since you should not kill ssh server processes.

See system users

Paste hardware list (hwls) in html format into pastehtml.com directly from console and return URI.

In this Linux box i need to become root to get the complete hardware list, so either become root before or call it with sudo as i did, your choice.

Annotate tail -f with timestamps

Update zone file Serial numbers

Will edit *.db files in the same directory with todays date. Useful for doing a mass update to domains on a nameserver, adding spf records, etc. Looks for a string starting with 200 or 201 followed by 7 numbers, and replaces with todays date. This won't overwrite Ip's but i would still do some double checking after running this. Make sure your server's date is correct, otherwise insert your own serial number. $rndc reload should usually follow this command.

Search some text from all files inside a directory

back ssh from firewalled hosts

host B (you) redirects a modem port (62220) to his local ssh. host A is a remote machine (the ones that issues the ssh cmd). once connected port 5497 is in listening mode on host B. host B just do a ssh 127.0.0.1 -p 5497 -l user and reaches the remote host'ssh. This can be used also for vnc and so on.

Touch a file using a timestamp embedded in the file name.

tstouch takes two arguments: a filename containing a timestamp, and an extended regular expression with the parenthesized section matching a timestamp of the form YYYYMMDDhhmm or YYYYMMDDhhmm.ss. It then touches the file with that timestamp.

Stay in the loop…

Follow the Tweets.

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