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SKILL
Section: Linux User's Manual (1)Updated: March 12, 1999
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NAME
skill, snice - report process statusSYNOPSIS
skill [signal to send] [options] process selection criteria snice [new priority] [options] process selection criteria
DESCRIPTION
The default signal for skill is TERM. Use -l or -L to list available signals. Particularly useful signals include HUP, INT, KILL, STOP, CONT, and 0. Alternate signals may be specified in three ways: -9 -SIGKILL -KILL.The default priority for snice is +4. (snice +4 ...) Priority numbers range from +20 (slowest) to -20 (fastest). Negative priority numbers are restricted to administrative users.
GENERAL OPTIONS
| -f | fast mode | This is not currently useful. |
| -i | interactive use |
You will be asked to approve each action.
|
| -v | verbose output |
Display information about selected processes.
|
| -w | warnings enabled | This is not currently useful. |
| -n | no action | This only displays the process ID. |
PROCESS SELECTION OPTIONS
Selection criteria can be: terminal, user, pid, command. The options below may be used to ensure correct interpretation.| -t | The next argument is a terminal (tty or pty). |
| -u | The next argument is a username. |
| -p | The next argument is a process ID number. |
| -c | The next argument is a command name. |
SIGNALS
The signals listed below may be available for use with skill. When known, numbers and default behavior are shown.| Name | Num | Action | Description |
| ALRM | 14 | exit | |
| HUP | 1 | exit | |
| INT | 2 | exit | |
| KILL | 9 | exit | this signal may not be blocked |
| PIPE | 13 | exit | |
| POLL | exit | ||
| PROF | exit | ||
| TERM | 15 | exit | |
| USR1 | exit | ||
| USR2 | exit | ||
| VTALRM | exit | ||
| STKFLT | exit | may not be implemented | |
| PWR | ignore | may exit on some systems | |
| WINCH | ignore | ||
| CHLD | ignore | ||
| URG | ignore | ||
| TSTP | stop | may interact with the shell | |
| TTIN | stop | may interact with the shell | |
| TTOU | stop | may interact with the shell | |
| STOP | stop | this signal may not be blocked | |
| CONT | restart | continue if stopped, otherwise ignore | |
| ABRT | 6 | core | |
| FPE | 8 | core | |
| ILL | 4 | core | |
| QUIT | 3 | core | |
| SEGV | 11 | core | |
| TRAP | 5 | core | |
| SYS | core | may not be implemented | |
| EMT | core | may not be implemented | |
| BUS | core | core dump may fail | |
| XCPU | core | core dump may fail | |
| XFSZ | core | core dump may fail |
EXAMPLES
| Command | Description |
| snice netscape crack +7 | Slow down netscape and crack |
| skill -KILL -v /dev/pts/* | Kill users on new-style PTY devices |
| skill -STOP torvalds davem tytso | Stop 3 users |
| snice -17 root bash | Give priority to root's shell |
SEE ALSO
top(1) kill(1) renice(1) nice(1)STANDARDS
No standards apply.AUTHOR
Albert Cahalan <acahalan@cs.uml.edu> wrote skill and snice in 1999 as a replacement for a non-free version. Michael K. Johnson <johnsonm@redhat.com> is the current maintainer of the procps collection.Please send bug reports to <acahalan@cs.uml.edu>
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- GENERAL OPTIONS
- PROCESS SELECTION OPTIONS
- SIGNALS
- EXAMPLES
- SEE ALSO
- STANDARDS
- AUTHOR
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