Commands by 6bc98f7f

Commands by 6bc98f7f (6)

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ping as traceroute

This command uses ping to get the routers' IP addresses to the destination host as traceroute does. If you know what I mean..
This is sample output - yours may be different.
12

for i in {1..30}; do ping -t $i -c 1 google.com; done | grep "Time to live exceeded"

6bc98f7f · 2012-02-19 13:37:04 9

Indent a one-liner.

Bash builtin type also indents the function. Show Sample Output

type <function name>

6bc98f7f · 2011-04-09 15:33:40 4

-P uses the POSIX output format, which makes information on each file system always printed on exactly one line. "column -t" makes a table from the input. Show Sample Output

df -P | column -t

6bc98f7f · 2011-04-09 13:12:46 14

Start vim without initialization

This will skip all initializations. Especially useful when your ~/.vimrc has something wrong.
This is sample output - yours may be different.
3

vim -u NONE yourfile

6bc98f7f · 2011-03-29 01:31:10 17
count processes with status

Use ps instead of top. But do not use BSD options at all, they are confusing. Use "s=" or "state=" to show consice process statuses. Show Sample Output
This is sample output - yours may be different.
```
$ ps -eo stat= | sort | uniq -c | sort -n
      1 R+
      1 SL
      1 SLl
      1 SN
      1 SNl
      1 S<s
      1 S<sl
      4 S<
      5 S+
      6 Ssl
      9 Ss+
     14 Ss
     40 Sl
    115 S
```
0

ps -eo stat= | sort | uniq -c | sort -n

6bc98f7f · 2011-03-25 13:01:42 4
List your MACs address

The output of ifconfig is localized, using it will fail in non-English environment. "ip" command in iproute2 provides a consistent output and thus is more robust Show Sample Output
This is sample output - yours may be different.
3

ip link | awk '/link/ {print $2}'

6bc98f7f · 2011-03-25 06:26:08 4

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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Calculates the date 2 weeks ago from Saturday the specified format.

Good for automating reports that need to run from between two dates.

Extracting a range of pages from a PDF, using GhostScript

In this example we extract pages 14-17

Is it a terminal?

Oddly, the isatty(3) glibc C call doesn't have a direct analogue as a command 'isatty(1)'. All is not lost as you can use test(1). For example, your script might be run from a tty or from a GUI menu item but it needs to get user-input or give feedback. Now your script can test STDIN with 'isatty 0' or STDOUT with 'isatty 1' and use xmessage(1) if the tty is not available. The other way to test for this is with 'tty -s' - but that's only for STDIN.

Find usb device in realtime

Using this command you can track a moment when usb device was attached.

Count lines in a file with grep

Returns the number of lines in a file, emulates "wc -l" behavior with grep.

Extract the contents of an RPM package to your current directory without installing them.

This assumes you have the 'rpm', 'rpm2cpio' and 'cpio' packages installed. This will extract the contents of the RPM package to your current directory. This is useful for working with the files that the package provides without installing the package on your system. Might be useful to create a temporary directory to hold the packages before running the extraction: $ mkdir /tmp/new-package/; cd /tmp/new-package

pipe output of a command to your clipboard

In turn you can get the contents of your clipboard by typing xsel by itself with no arguments: $ xsel This command requires you to install the xsel utility which is free

Determine status of a RAID write-intent bitmap

Report information about a bitmap file.

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"

Unzip multi-part zip archive

Assuming you have a multi-part archive like "archive.zip archive.z01 archive.z02 ...", unzip will not handle these correctly. If you "fix" the parts into one big file with zip -F before, it works.

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