Commands by servermanaged

The variable ? contain the last exit status of a command, it can be printed for troubleshooting purpose.

I use this simple command for remove all backup files generated usually by editors like Vim and Emacs.

During this operation :

# mv Joomla_1.5.10-Stable-Full_Package.zip /var/www/joomla/

I invoke /var/www/joomla/ as last command argument. To change in this directory I can use

# cd !$

So I go to

hob:/var/www/joomla#

Assuming that 219,229 and 221 are entries in history, I recall them in a single line for execute multiple commands

219 ifdown wlan0

...

221 ifup wlan0

...

229 iwconfig wlan0 mode Managed

so the result is execution of # ifdown wlan0 ; iwconfig wlan0 mode Managed ; ifup wlan0

tailf same as tail -f follow the flow of a log file, showing it in real time to stdout.

Aureport is a tool for displaying auditd system log. -x options cause to display launched executable on system.

Aureport work with auditd so auditd must be installed an running on a system.

Tested on CentOS / Debian

Simple but useful command, I use this for purge an hard disk entry in Virtualbox registry file (is in ~user/.Virtualbox) that persist if I erase a Virtual Machine, so I need to delete it manually.

G option cause a file to be spacing line by line.

Umask is obtained subtracting 7 from each cypher of octal format. I store octal perm format in an array,then for each element of array I subtract 7. The result is the umask.

I use this for connect via sftp to a server listening on a non default ssh port.

ifstat, part of ifstat package, is a tool for displaying bandwidth and other statistics. The -n option avoid to display header periodically, the -t option put a timestamp at the beginning of the line.

Works for me on Debian and CentOS

If histappend options is set in bash, the file .bash_history will not be overwrite and history list is append to it.

pinfo package provide a nice info alternative based on ncurses.

Works on CentOS ad OpenBSD too, display time of accounts connection on a system, -p option print individual user's statistics.

Lam is a command available on Bsd (I've tested it on OpenBSD).Is useful for laminate a file line by line. The -f option set the field width ( -f min.max ).

Lndir create from source directory to destination directory a full symlink tree of all contents of source directory, really useful for propagate changes from a directory to another.

Look search for lines in a file that beginning with a given string.

Same as $ grep ^n /etc/passwd

This is useful for remove all packages that are part of a common suite.

I have often file like this

01 - file.file

02 - file.file

03 - file.file

I rename all with this command

for f in * ; do mv -- "$f" "${f/[0-9][0-9] \- /}" ; done

then it looks like this

file.file

file.file

file.file

etc

Nicely display permissions in octal format and filename for a given directory

Execute a command on shell logout,and run it until is finished,then shell is closed.

Suppose that you had change in a directory like /home/user/mycode/code, and now you need to list it, instead of type entire path again, use ls !$ to recall path and list. Useful with many commands, this is only an example. (In this case, same result can be achivied with ls .)