Commands by betsubetsu

Commands by betsubetsu (7)

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How to execute and encrypted and password-protected bash script?

echo "ls" > script.bash; This is my script, a simple 'ls'. gpg -c script.bash; Here I encrypt and passord-protect my script. This creates file script.bash.gpg. cat script.bash.gpg | gpg -d --no-mdc-warning | bash Here I open file script.bash.gpg, decrypt it and execute it.
This is sample output - yours may be different.
-2

echo "ls" > script.bash; gpg -c script.bash; cat script.bash.gpg | gpg -d --no-mdc-warning | bash

betsubetsu · 2013-03-10 09:34:12 0

Sort installed rpms in alphabetic order with their size.

Show Sample Output

rpm -qa --qf "%-30{NAME} %-10{SIZE}\n" | sort -n | less

betsubetsu · 2010-04-14 07:30:37 0

Sort installed rpms by decreasing size.

It's all said in the title. Show Sample Output

rpm -qa --qf "%-10{SIZE} %-30{NAME}\n" | sort -nr | less

betsubetsu · 2010-04-14 07:28:41 0

Compare prices in euro of the HTC Desire on all the european websites of Expansys.

You think Expansys in all these countries will sell the HTC Desire for the same price? Well, you'll be surprised. Most of them will be sold at 499.99 EUR but the cheapest can be found in Germany and the most expensive, in Belgium.
This is sample output - yours may be different.
2

for i in be bg cz de es fi fr hu it lv lu at pl pt ro sk si ; do echo -n "$i " ; wget -q -O - http://www.expansys.$i/d.aspx?i=196165 | grep price | sed "s/.*<p id='price'><strong>€ $[0-9]*[,.][0-9]*$.*/\1/g"; done

betsubetsu · 2010-03-18 15:13:20 2
Set file access control lists

The file myfile is owned by tom and has read and write permissions for tom. Group and other permissions are empty which make myfile readable and writable only by tom. setfacl enables user tom to give read permission to user john only. The command 'ls -l' shows a '+' sign telling us that file access control list has been setup for myfile. Show Sample Output
This is sample output - yours may be different.
```
$ ls -l myfile
-rw------- 1 tom tom 248060 2009-02-15 14:02 myfile
$ getfacl myfile
# file: myfile
# owner: tom
# group: tom
user::rw-
group::---
other::---
$ setfacl -m u:john:r-- myfile
$ getfacl myfile
# file: myfile
# owner: tom
# group: tom
user::rw-
user:john:r--
group::---
mask::r-x
other::---
$ ls -l myfile
-rw-------+ 1 tom tom 248060 2009-02-15 14:02 myfile
```
3

setfacl -m u:john:r-- myfile

betsubetsu · 2009-02-21 21:05:45 0
Switch 2 characters on a command line.

If you typed 'sl', put the cursor on the 'l' and hit ctrl-t to get 'ls'.
This is sample output - yours may be different.
25

ctrl-t

betsubetsu · 2009-02-20 17:38:49 0
pushd rotates the stack so that the second directory comes at the top.

'pushd +1' is equivalent to 'pushd'. Can be 'pushd +3' or more generaly 'pushd +N'. Can also be 'pushd -N'. More description in 'man bash'. Show Sample Output
This is sample output - yours may be different.
```
$ dirs -v
 0  /etc
 1  /tmp
 2  ~
$ pushd +2
~ /etc /tmp
$ dirs -v
 0  ~
 1  /etc
 2  /tmp
$ dirs
/var /tmp ~ /etc
$ pushd -2
/tmp ~ /etc /var
```
1

pushd +2; pushd -2

betsubetsu · 2009-02-20 12:26:18 0

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rsync Command that limits bandwidth

Useful for transferring large file over a network during operational hours

Bypass 1000 Entry limit of Active Directory with ldapsearch

That command bypass the entry limit specifing page results size, when the search arrive to the limit ldapsearch magically reiterate it from the last entry.

Write and read HDD external

Write and read HDD external FreeBSD

Skip filenames with control characters, a.k.a tab,newline etc

Rename files in batch

Quick access to the ascii table.

How to estimate the storage size of all files not named *.[extension] on the current directory

With this sentence we can estimate the storage size of all files not named *.jpg on the current directory. The syntax is based on Linux, for Unix compliance use: find ./* -prune ! -name '*.jpg' -ls |awk '{TOTAL+=$7} END {print int(TOTAL/(1024^2))"MB"}' We can change the jpg extension for whatever extension what we need

Find and delete oldest file of specific types in directory tree

This works on my ubuntu/debian machines. I suspect other distros need some tweaking of sort and cut. I am sure someone could provide a shorter/faster version.

Merge files, joining each line in one line

For when GUI programs stop responding..

man xkill

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