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 4

Indent a one-liner.

Bash builtin type also indents the function. Show Sample Output

type <function name>

6bc98f7f · 2011-04-09 15:33:40 0

-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 5

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.
2

vim -u NONE yourfile

6bc98f7f · 2011-03-29 01:31:10 0
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 0
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 0

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Show latest changed files

Filter the output of a file continously using tail and grep

The OPs solution will work, however on some systems (bsd), grep will not filter the data, unless the --line-buffered option is enabled.

Remove all unused kernels with apt-get

Note the double space: "...^ii␣␣linux-image-2..." Like 5813, but fixes two bugs: [1]This leaves the meta-packages 'linux-headers-generic' and 'linux-image-generic' alone so that automatic upgrades work correctly in the future. [2]Kernels newer than the currently running one are left alone (this can happen if you didn't reboot after installing a new kernel). I'm bummed that this took 228 characters. I'd like to see a simpler version.

grep for minus (-) sign

Use flag "--" to stop switch parsing

Bind a key with a command

Now type Ctrl-l and it will list all files

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

add repeated watermark to image

list files recursively by size

Get the full path to a file

Part of coreutils - so needs no extra package...

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